Nim.nim

from nre import contains, re

var
    longest: seq[string]
    words: File
    word: string
    maxlen: int = 0

proc invalid(s: string): bool =
    s.contains(re"(?i)[gkmqvwxzio]")

discard open(words, "words.txt")
while words.readLine(word):
    if word.len == maxlen and not invalid(word):
        longest.add(word)
    elif word.len > maxlen and not invalid(word):
        longest = @[word]
        maxlen = word.len

for w in items(longest): echo w