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diff --git a/chall/ply-2.2/example/yply/yply.py b/chall/ply-2.2/example/yply/yply.py
deleted file mode 100755
index a439817..0000000
--- a/chall/ply-2.2/example/yply/yply.py
+++ /dev/null
@@ -1,53 +0,0 @@
-#!/usr/local/bin/python
-# yply.py
-#
-# Author: David Beazley (dave@dabeaz.com)
-# Date  : October 2, 2006
-#
-# Converts a UNIX-yacc specification file into a PLY-compatible
-# specification.   To use, simply do this:
-#
-#   % python yply.py [-nocode] inputfile.y >myparser.py
-#
-# The output of this program is Python code. In the output,
-# any C code in the original file is included, but is commented.
-# If you use the -nocode option, then all of the C code in the
-# original file is discarded.
-#
-# Disclaimer:  This just an example I threw together in an afternoon.
-# It might have some bugs.  However, it worked when I tried it on
-# a yacc-specified C++ parser containing 442 rules and 855 parsing
-# states.
-#
-
-import sys
-sys.path.insert(0,"../..")
-
-import ylex
-import yparse
-
-from ply import *
-
-if len(sys.argv) == 1:
-    print "usage : yply.py [-nocode] inputfile"
-    raise SystemExit
-
-if len(sys.argv) == 3:
-    if sys.argv[1] == '-nocode':
-         yparse.emit_code = 0
-    else:
-         print "Unknown option '%s'" % sys.argv[1]
-         raise SystemExit
-    filename = sys.argv[2]
-else:
-    filename = sys.argv[1]
-
-yacc.parse(open(filename).read())
-
-print """
-if __name__ == '__main__':
-    from ply import *
-    yacc.yacc()
-"""
-
-