import re
##########################################
# Version 3 - inputs pattern from user   #
##########################################
# Load the lexicon resource as a string
with open('upperwords.txt') as f:
    lex=f.read()
# Prompt for the pattern to match
banner = '''

u3aTod Crossword Helper

Helps you solve a crossword clue or a word in a codeword,
When prompted, enter a pattern matching a partially-known
answer. Type the letters you know, and write a dot in
place of the letters you don't know.  Example: ..T.O. which
would match PYTHON. Max length 13 characters.

'''
print(banner)
user_pattern=input('Enter your crossword answer pattern: ')
user_pattern=r'{}'.format("\\b"+user_pattern.upper()+"\\b")
# Compile the pattern
patt=re.compile(user_pattern)
# Match pattern in lex
res=patt.findall(lex)
# Display matches, several to a line
buffer=''
for word in res:
    if(len(buffer))>60:
        print(buffer)
        buffer=''
    buffer+=word
    buffer+=' '
print(buffer)