#-------------------------------------------------------------------------------
# Name:        module1
# Purpose:
#
# Author:      new
#
# Created:     19/12/2013
# Copyright:   (c) new 2013
# Licence:     <your licence>
#-------------------------------------------------------------------------------
#!/usr/bin/env python
 
def escape_for_c_sharp(raw_string):
    converted_string = ""
    for character in raw_string:
        # Escape special characters
        if character == "\\":
            converted_string += "\\\\"# \\
        # (
        elif character == "(":
            converted_string += "\\("# \(
        # )
        elif character == ")":
            converted_string += "\\)"# \)
        # [
        elif character == "[":
            converted_string += "\\["# \[
        # ]
        elif character == "]":
            converted_string += "\\]"# \]
        # {
        elif character == "{":
            converted_string += "\\{"# \{
        # }
        elif character == "}":
            converted_string += "\\}"# \}
        # .
        elif character == ".":
            converted_string += "\\."# \.
        # +
        elif character == "+":
            converted_string += "\\+"# \+
        # ^
        elif character == "^":
            converted_string += "\\^"# \^
        # $
        elif character == "$":
            converted_string += "\\$"# \$
        # |
        elif character == "|":
            converted_string += "\\|"# \|
        # *
        elif character == "*":
            converted_string += "\\*"# \*
        # ?
        elif character == "?":
            converted_string += "\\?"# \?
        # Not a special character
        else:
            converted_string += character
    return converted_string
 
 
def read_file(path):
    """grab the contents of a file"""
    f = open(path, "r")
    data = f.read()
    f.close()
    return data
 
 
def save_file(file_name,data):
    file = open(file_name, "wb")
    file.write(data)
    file.close()
 
 
def main():
    text_to_convert = read_file("input.txt")
    converted_text = escape_for_c_sharp(text_to_convert)
    save_file("output.txt", converted_text)
    print converted_text
 
if __name__ == '__main__':
    main()