一个字母:a l
两个字母:an ,he, is ,on, in, it,by, hi, go, am , ax, do, if , so ,as ,us , up ,me ,to,ok
三个字母:his, min ,ago , get ,let , The, can ,his ,she ,bed ,bet ,you ,was ,way ,say ,for ,red ,cat ,dog ,fox ,one ,tow
四个字母:give ,girl ,your ,come , have ,half ,that ,than , mine ,mind ,mean ,four ,find ,five ,fine