你知道英语中反向单词，就是字母正过来和反过去都存在的有多少对？例如：pool和loop就成为一对。最近有有兴趣编了一个
小程序，从网上找到了21111个单词，稍微处理一下，发现有94对，平均字长只有3.55。恩，挺神奇的。在
这里下载程序、结果、和中英文词库。有兴趣你也可以试一下中文单词的匹配，不过乍一眼没咋看到有这个可能性。以下是英文匹配结果：
abut,tuba; ajar,raja; am,ma; animal,lamina; are,era; avid,diva; bad,dab; bag,gab; ban,nab; bard,drab; bat,tab; bed,deb; bin,nib; bog,gob; brag,garb; bud,dub; bun,nub; bur,rub; bus,sub; but,tub; dam,mad; deem,meed; deer,reed; dew,wed; dial,laid; dim,mid; dog,god; don,nod; doom,mood; door,rood; draw,ward; drawer,reward; dray,yard; dual,laud; edit,tide; eel,lee; emir,rime; emit,time; evil,live; flog,golf; flow,wolf; gas,sag; gnat,tang; got,tog; gulp,plug; gum,mug; gut,tug; keel,leek; keep,peek; lager,regal; lair,rial; lap,pal; leer,reel; leper,repel; lever,revel; liar,rail; loop,pool; loot,tool; mar,ram; mart,tram; mat,tam; may,yam; meet,teem; moor,room; nap,pan; net,ten; new,wen; nip,pin; nit,tin; no,on; not,ton; now,won; nut,tun; nuts,stun; pacer,recap; par,rap; part,trap; pas,sap; pat,tap; pay,yap; pit,tip; pot,top; pus,sup; rat,tar; raw,war; rebut,tuber; rot,tor; saw,was; spat,taps; spot,tops; sway,yaws; tort,trot; trow,wort; way,yaw;
Total: 94; Average length:3.553191
