a-a a-b a-c a-t aaa aab aac aak aao aat aaw aay ab- aba abb abc abk abo abt abw aby ac- aca acb acc ack aco act acw acy aka akb akc akk ako akw aoa aob aoc aok aoo aot aow at- ata atb atc ato att atw aw- awa awb awc awk awo awt aww awy ay- aya ayc ayk ayo ayt ayw baa bab bac bak bao bat baw bay bba bbb bbc bbk bbo bbt bbw bby bca bcb bcc bck bco bct bcy bka bkb bkc bkk bko bkt bkw boa bob boc bok boo bot bow boy bta btb btc btk bto btt btw bty bwa bwb bwc bwk bwo bwy by- bya byc byk byo byt c-- caa cab cac cak cao cat caw cay cba cbb cbc cbk cbo cbt cbw cby cca ccb ccc cck cco cct ccw cka ckb ckc cko ckt ckw cky co- coa cob coc cok coo cot cow coy cta ctb ctc ctk cto ctt ctw cty cw- cwa cwb cwc cwk cwo cwt cya cyb cyc cyk cyo cyt cyw k-t ka- kaa kab kac kak kao kat kaw kay kba kbb kbc kbk kbo kbw kca kcb kcc kck kct kkb kkc kkk kkt kky koa kob koc kok koo kot kow koy kta ktb ktc ktk kto ktt ktw kw- kwa kwc kwk kwo kwt kww kya kyc kyo kyt kyw oaa oab oac oak oao oat oaw ob- oba obb obc obk obo obt obw oby oc- oca ocb occ ock oco oct ocw oka okb okc okk oko okw oo- ooa oob ooc ook ooo oot oow ot- ota otb otc otk oto ott otw owa owb owc owk owo owt oww oya oyo taa tab tac tak tao tat taw tay tba tbb tbc tbk tbo tbt tca tcb tcc tck tco tct tcw tka tkb tkc tkk tko tkt tkw tky to- toa tob toc tok too tot tow toy tta ttb ttc ttk tto ttt ttw tty twa twb twc two twt tww twy tya tyc tyo tyt waa wab wac wak wao wat waw way wba wbb wbc wbo wbt wbw wca wcb wcc wck wco wct wcw wka wkb wkc wko wkt wkw wky woa wob woc wok woo wot wow woy wta wtb wtc wto wtt wtw wwa wwc wwo wwt www wy- wya wyc wyk wyo wyt yaa yab yac yak yao yat yaw yay ybc yby yca ycc yco ycw ycy yka ykk yob yoc yok yoo yot yow yoy yta ytc ytk yto ytt ywc yyb yyc yyt yyy