a-a a-b a-c a-t aaa aab aac aam aan aao aat aay ab- aba abb abc abm abn abo abt aby ac- aca acb acc acm acn aco act acy ama amb amc amm amn amo amt amy an- ana anb anc anm ann ano ant any aoa aob aoc aom aon aoo aot at- ata atb atc atm atn ato att ay- aya ayc ayn ayo ayt baa bab bac bam ban bao bat bay bba bbb bbc bbm bbn bbo bbt bby bca bcb bcc bcm bcn bco bct bcy bma bmb bmc bmm bmn bmo bmt bna bnb bnc bnn bno bnt boa bob boc bom bon boo bot boy bta btb btc btm btn bto btt bty by- bya byc bym byn byo byt c-- caa cab cac cam can cao cat cay cba cbb cbc cbm cbn cbo cbt cby cca ccb ccc ccm ccn cco cct cma cmb cmc cmm cmn cmo cmt cmy cn- cna cnb cnc cnm cnn cno cnt cny co- coa cob coc com con coo cot coy cta ctb ctc ctm ctn cto ctt cty cya cyb cyc cym cyn cyo cyt m-o maa mab mac mam man mao mat may mba mbb mbc mbm mbo mbt mc- mca mcb mcc mcm mcn mco mct mma mmb mmc mmm mmn mmo mmt mna mnb mnc mnm mnn mno mnt moa mob moc mom mon moo mot moy mta mtb mtc mtm mtn mto mtt my- mya myb myc mym myn myo myt naa nab nac nam nan nao nat nay nba nbb nbc nbm nbn nbo nbt nca ncb ncc ncm ncn nco nct nma nmb nmc nmm nmn nmo nmt nna nnb nnc nnm nnn nno nnt no- noa nob noc nom non noo not noy nta ntb ntc ntm ntn nto ntt nya nyc nym nyn nyo nyt nyy oaa oab oac oam oan oao oat ob- oba obb obc obm obn obo obt oby oc- oca ocb occ ocm ocn oco oct om- oma omb omc omm omn omo omt omy on- ona onb onc onn ono ont ony oo- ooa oob ooc oom oon ooo oot ot- ota otb otc otm otn oto ott oya oyo taa tab tac tam tan tao tat tay tba tbb tbc tbm tbn tbo tbt tca tcb tcc tcm tcn tco tct tma tmb tmc tmm tmn tmo tmt tmy tna tnb tnc tnm tnn tno tnt to- toa tob toc tom ton too tot toy tta ttb ttc ttm ttn tto ttt tty tya tyc tym tyn tyo tyt yaa yab yac yam yan yao yat yay ybc ybm yby yca ycc yco ycy yma ymc ymm ymo ymt yna ynn yny yob yoc yom yon yoo yot yoy yta ytc ytm ytn yto ytt yyb yyc yyt yyy