26个字母任意四个组合列表
bear, also, come, does, easy, from, girl,
have, idea, just, know, long, more, next
only, park, quiz, read, some, this, used,
very, want, Xeon, your, zero, able, back
cans, down, each, find, game, high,
into, jump, kept, left, made, news, open,
pain, quit, ride, Show, then, upon, verb
with, x-ray, year zone