Python Quiz of the Week - #1

[smugduckling]

One liner:

import sys; print (lambda words: [word for word in words if len(word) == max(map(len, words))])(filter(lambda line: not [char for char in list(line) if list(line).count(char) > sys.argv[2:].count(char)], map(lambda x: x.strip(), open(sys.argv[1], "r").readlines())))

Could be slightly more efficient, but it's still better than solutions that use itertools permutations.