add directory Minix
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Minix/2.0.0/wwwman/man1/sz.1.html
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Minix/2.0.0/wwwman/man1/sz.1.html
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<HTML>
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<HEAD>
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<TITLE>sz(1)</TITLE>
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</HEAD>
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<BODY>
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<H1>sz(1)</H1>
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<HR>
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<PRE>
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</PRE>
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<H2>NAME</H2><PRE>
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sz - send a file using the zmodem protocol
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</PRE>
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<H2>SYNOPSIS</H2><PRE>
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<STRONG>sz</STRONG> [<STRONG>-LNbdefnopqruvy+</STRONG>] [<STRONG>-ci</STRONG> <EM>command</EM>] [<STRONG>-Ll</STRONG> n] [<STRONG>-t</STRONG> <EM>timeout</EM>]
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</PRE>
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<H2>OPTIONS</H2><PRE>
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<STRONG>-L</STRONG> Use <EM>n</EM>-byte packets
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<STRONG>-N</STRONG> Overwrite if source is newer/longer
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<STRONG>-b</STRONG> Binary file
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<STRONG>-c</STRONG> Send command for execution
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<STRONG>-d</STRONG> Convert dot to slash in names
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<STRONG>-e</STRONG> Escape for all control characters
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<STRONG>-f</STRONG> Send full path name
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<STRONG>-i</STRONG> Send command and return immediately
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<STRONG>-l</STRONG> Flow control every <EM>n</EM> packets
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<STRONG>-n</STRONG> Overwrite destination if source is newer
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<STRONG>-o</STRONG> Use old (16-bit) checksum
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<STRONG>-p</STRONG> Protect file if it already exists
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<STRONG>-q</STRONG> Quiet; opposite of verbose
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<STRONG>-r</STRONG> Resume interrupt file transfer
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<STRONG>-t</STRONG> Set <EM>timeout</EM> in tenths of a second
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<STRONG>-u</STRONG> Unlink file after successful transmission
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<STRONG>-v</STRONG> Verbose; opposite of quiet
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<STRONG>-y</STRONG> Yes, clobber existing files
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<STRONG>-+</STRONG> Append to an existing file
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</PRE>
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<H2>EXAMPLES</H2><PRE>
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<STRONG>sz</STRONG> <STRONG>file</STRONG> <STRONG></dev/tty01</STRONG> <STRONG>>/dev/tty01</STRONG>
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# Send <EM>file</EM>
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</PRE>
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<H2>DESCRIPTION</H2><PRE>
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XMODEM, YMODEM, and ZMODEM are a family of protocols that are widely used
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is the MS-DOS world for transferring information reliably from one
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computer to another. In all of these protocols, a series of bytes are
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sent from one computer to the other, and then an acknowledgement is sent
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back to confirm correct reception. Checksums are used to detect errors
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so that transmission is reliable even in the face of noisy telephone
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lines. <EM>Sz</EM> is a program that sends a file sent from another computer
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using the zmodem protocol. The file can be received using <EM>rz</EM>.
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<EM>Sz</EM> uses the ZMODEM error correcting protocol to send one or more files
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over a dial-in serial port to a variety of programs running under MINIX,
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UNIX, MS-DOS, CP/M, VMS, and other operating systems. It is the
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successor to XMODEM and YMODEM.
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ZMODEM greatly simplifies file transfers compared to XMODEM. In addition
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to a friendly user interface, ZMODEM provides Personal Computer and other
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users an efficient, accurate, and robust file transfer method.
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ZMODEM provides complete end-to-end data integrity between application
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programs. ZMODEM's 32 bit CRC catches errors that sneak into even the
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most advanced networks.
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Output from another program may be piped to <EM>sz</EM> for transmission by
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denoting standard input with -:
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<STRONG>ls</STRONG> <STRONG>-l</STRONG> <STRONG>|</STRONG> <STRONG>sz</STRONG> <STRONG>-</STRONG>
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The program output is transmitted with the filename <EM>sPID</EM>.<EM>sz</EM> where PID is
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the process ID of the <EM>sz</EM> program. If the environment variable <EM>ONAME</EM> is
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set, that is used instead. In this case, the command:
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<STRONG>ls</STRONG> <STRONG>-l</STRONG> <STRONG>|</STRONG> <STRONG>ONAME=con</STRONG> <STRONG>sz</STRONG> <STRONG>-ay</STRONG> <STRONG>-</STRONG>
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will send a 'file' to the PC-DOS console display. The <STRONG>-y</STRONG> option instructs
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the receiver to open the file for writing unconditionally. The <STRONG>-a</STRONG> option
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causes the receiver to convert UNIX newlines to PC-DOS carriage returns
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and linefeeds. On UNIX systems, additional information about the file is
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transmitted. If the receiving program uses this information, the
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transmitted file length controls the exact number of bytes written to the
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output dataset, and the modify time and file mode are set accordingly.
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If <EM>sz</EM> is invoked with $SHELL set and if that variable contains the string
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<EM>rsh</EM> or <EM>rksh</EM> (restricted shell), <EM>sz</EM> operates in restricted mode.
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Restricted mode restricts pathnames to the current directory and <EM>PUBDIR</EM>
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(usually /<EM>usr</EM>/<EM>spool</EM>/<EM>uucppublic</EM>) and/or subdirectories thereof.
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The options and flags available are:
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<STRONG>-+</STRONG>
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Instruct the receiver to append transmitted data to an existing file.
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<STRONG>-a</STRONG>
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Convert NL characters in the transmitted file to CR/LF. This is done
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by the sender for XMODEM and YMODEM, by the receiver for ZMODEM.
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<STRONG>-b</STRONG>
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Binary override: transfer file without any translation.
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<STRONG>-c</STRONG>
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Send COMMAND (follows <EM>c</EM>) to the receiver for execution, return with
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COMMAND's exit status.
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<STRONG>-d</STRONG>
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Change all instances of '.' to '/' in the transmitted pathname. Thus,
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C.omenB0000 (which is unacceptable to MS-DOS or CP/M) is transmitted
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as C/omenB0000. If the resultant filename has more than 8 characters
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in the stem, a '.' is inserted to allow a total of eleven.
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<STRONG>-e</STRONG>
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Escape all control characters; normally XON, XOFF, DLE, CR-@-CR, and
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Ctrl-X are escaped.
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<STRONG>-f</STRONG>
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Send Full pathname. Normally directory prefixes are stripped from the
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transmitted filename.
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<STRONG>-i</STRONG>
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Send COMMAND (follows <EM>i</EM>) to the receiver for execution, return
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Immediately upon the receiving program's successful reception of the
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command.
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<STRONG>-L</STRONG>
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Use ZMODEM sub-packets of length <EM>n</EM> (follows <EM>L</EM>). A larger <EM>n</EM> (32 <= <EM>n</EM> <=
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1024) gives slightly higher throughput, a smaller one speeds error
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recovery. The default is 128 below 300 baud, 256 above 300 baud, or
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1024 above 2400 baud.
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<STRONG>-l</STRONG>
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Wait for the receiver to acknowledge correct data every <EM>n</EM> (32 <= <EM>n</EM> <=
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1024) characters. This may be used to avoid network overrun when XOFF
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flow control is lacking.
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<STRONG>-n</STRONG>
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Send each file if destination file does not exist. Overwrite
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destination file if source file is newer than the destination file.
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<STRONG>-N</STRONG>
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Send each file if destination file does not exist. Overwrite
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destination file if source file is newer or longer than the
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destination file.
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<STRONG>-o</STRONG>
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Disable automatic selection of 32 bit CRC.
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<STRONG>-p</STRONG>
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Protect existing destination files by skipping transfer if the
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destination file exists.
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<STRONG>-q</STRONG>
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Quiet suppresses verbosity.
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<STRONG>-r</STRONG>
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Resume interrupted file transfer. If the source file is longer than
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the destination file, the transfer commences at the offset in the
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source file that equals the length of the destination file.
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<STRONG>-t</STRONG>
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Change timeout. The timeout, in tenths of seconds, follows, the <STRONG>-t</STRONG>
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flag.
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<STRONG>-u</STRONG>
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Unlink the file after successful transmission.
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<STRONG>-w</STRONG>
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Limit the transmit window size to <EM>n</EM> bytes (<EM>n</EM> <EM>follows</EM> <STRONG>(enw</STRONG>).
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<STRONG>-v</STRONG>
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Verbose causes a list of file names to be appended to /<EM>tmp</EM>/<EM>szlog</EM>.
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<STRONG>-y</STRONG>
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Instruct a ZMODEM receiving program to overwrite any existing file
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with the same name.
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<STRONG>-Y</STRONG>
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Instruct a ZMODEM receiving program to overwrite any existing file
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with the same name, and to skip any source files that do have a file
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with the same pathname on the destination system.
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<STRONG>Examples</STRONG>
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Below are some examples of the use of <EM>sz</EM>.
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<STRONG>sz</STRONG> <STRONG>-a</STRONG> <STRONG>d*u.c</STRONG>
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This single command transfers all .c files in the current directory with
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conversion (<STRONG>-a</STRONG>) to end-of-line conventions appropriate to the receiving
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environment.
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<STRONG>sz</STRONG> <STRONG>-Yan</STRONG> <STRONG>d*u.c</STRONG> <STRONG>d*u.h</STRONG>
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Send only the .<EM>c</EM> and .<EM>h</EM> files that exist on both systems, and are newer
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on the sending system than the corresponding version on the receiving
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system, converting MINIX to MS-DOS text format.
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</PRE>
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<H2>SEE ALSO</H2><PRE>
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<STRONG><A HREF="../man1/rz.1.html">rz(1)</A></STRONG>, <STRONG><A HREF="../man1/term.1.html">term(1)</A></STRONG>.
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</PRE>
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</BODY>
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</HTML>
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