This script produces every possible pairing of letters from two words -- a letter from arg1 and a letter from arg2. Usage: python pairLettersInWords.py abcde fghij 12345

pairLettersInWords.py

import sys
import itertools

if len(sys.argv) < 3:
    print("Too few arguments -- at least 2 args are needed.")
    exit(0)

print(len(sys.argv))
words = list(map(list, sys.argv[1:]))

result = [''.join(grouping) for grouping in list(itertools.product(*words))]

for grouping in result:
    print(grouping)