#!@PYTHON@

import sys
import os

if (len(sys.argv) > 1):
    filename = sys.argv[1]
    if not os.path.exists(filename):
        sys.stdout.write("Error: %s doesn't exist" % filename)
        sys.exit(1)
    source = open(filename, "r")
else:
    source = sys.stdin

char = None
while (char != ""):
    char = source.read(1)
    if (char == chr(8)): continue
    elif (char == chr(13)): sys.stdout.write("\n")
    elif (char != ""):
        sys.stdout.write(char)
        sys.stdout.flush()

if (source != sys.stdin):
    source.close()