根据给定的字母，生成尽可能多的单词。

字母：S, O, N, T, U, P
单词：not, nut, on, top, pot, pun, sop, son, sun, sup, spun, stop, up, upon, post, put, nos, nots, opts, out, outs, puns, pus, puton, snot, soup, spun, stun, to, ton, tons, tun, tuns, unto.