a-a a-b a-c a-t aaa aab aac aak aan aao aat aaw ab- aba abb abc abk abn abo abt abw ac- aca acb acc ack acn aco act acw aka akb akc akk akn ako akw an- ana anb anc ank ann ano ant aoa aob aoc aok aon aoo aot aow at- ata atb atc atn ato att atw aw- awa awb awc awk awn awo awt aww baa bab bac bak ban bao bat baw bba bbb bbc bbk bbn bbo bbt bbw bca bcb bcc bck bcn bco bct bka bkb bkc bkk bkn bko bkt bkw bna bnb bnc bnk bnn bno bnt bnw boa bob boc bok bon boo bot bow bta btb btc btk btn bto btt btw bwa bwb bwc bwk bwo c-- caa cab cac cak can cao cat caw cba cbb cbc cbk cbn cbo cbt cbw cca ccb ccc cck ccn cco cct ccw cka ckb ckc cko ckt ckw cn- cna cnb cnc cnn cno cnt cnw co- coa cob coc cok con coo cot cow cta ctb ctc ctk ctn cto ctt ctw cw- cwa cwb cwc cwk cwn cwo cwt k-t ka- kaa kab kac kak kan kao kat kaw kba kbb kbc kbk kbn kbo kbw kca kcb kcc kck kcn kct kkb kkc kkk kkn kkt kn- kna knc knk knn kno knt koa kob koc kok kon koo kot kow kta ktb ktc ktk ktn kto ktt ktw kw- kwa kwc kwk kwo kwt kww naa nab nac nak nan nao nat naw nba nbb nbc nbk nbn nbo nbt nbw nca ncb ncc nck ncn nco nct ncw nka nkc nkk nkn nko nkt nna nnb nnc nnk nnn nno nnt nnw no- noa nob noc nok non noo not now nta ntb ntc ntk ntn nto ntt nwa nwb nwc nwn nwo nwt oaa oab oac oak oan oao oat oaw ob- oba obb obc obk obn obo obt obw oc- oca ocb occ ock ocn oco oct ocw oka okb okc okk oko okw on- ona onb onc onk onn ono ont oo- ooa oob ooc ook oon ooo oot oow ot- ota otb otc otk otn oto ott otw owa owb owc owk own owo owt oww taa tab tac tak tan tao tat taw tba tbb tbc tbk tbn tbo tbt tca tcb tcc tck tcn tco tct tcw tka tkb tkc tkk tko tkt tkw tna tnb tnc tnk tnn tno tnt tnw to- toa tob toc tok ton too tot tow tta ttb ttc ttk ttn tto ttt ttw twa twb twc twn two twt tww waa wab wac wak wan wao wat waw wba wbb wbc wbn wbo wbt wbw wca wcb wcc wck wcn wco wct wcw wka wkb wkc wko wkt wkw wn- wna wnc wnn wno wnt wnw woa wob woc wok won woo wot wow wta wtb wtc wtn wto wtt wtw wwa wwc wwn wwo wwt www