def keyword_to_key(word,alphabet='<STR_LIT>'):
ret = '<STR_LIT>'<EOL>word = (word + alphabet).upper()<EOL>for i in word:<EOL><INDENT>if i in ret: continue<EOL>ret += i<EOL><DEDENT>return ret<EOL>
convert a key word to a key by appending on the other letters of the alphabet.
    e.g. MONARCHY -> MONARCHYBDEFGIJKLPQSTUVWXZ