-th a-a a-b a-c a-t aaa aab aac aah aam aao aat aay ab- aba abb abc abh abm abo abt aby ac- aca acb acc ach acm aco act acy aha ahb ahc ahh ahm aho aht ahy ama amb amc amh amm amo amt amy aoa aob aoc aoh aom aoo aot at- ata atb atc ath atm ato att ay- aya ayc ayh ayo ayt baa bab bac bah bam bao bat bay bba bbb bbc bbh bbm bbo bbt bby bca bcb bcc bch bcm bco bct bcy bha bhb bhc bhh bhm bho bht bma bmb bmc bmh bmm bmo bmt boa bob boc boh bom boo bot boy bta btb btc bth btm bto btt bty by- bya byc byh bym byo byt c-- caa cab cac cah cam cao cat cay cba cbb cbc cbh cbm cbo cbt cby cca ccb ccc cch ccm cco cct ch- cha chb chc chh chm cho cht chy cma cmb cmc cmh cmm cmo cmt cmy co- coa cob coc coh com coo cot coy cta ctb ctc cth ctm cto ctt cty cya cyb cyc cym cyo cyt haa hab hac hah ham hao hat hay hba hbb hbc hbh hbm hbo hbt hby hca hcb hcc hch hcm hco hct hcy hha hhb hhc hhh hhm hho hht hhy hma hmb hmc hmh hmm hmo hmt hmy hoa hob hoc hoh hom hoo hot hoy hta htb htc hth htm hto htt hty hy- hya hyb hyc hyh hym hyo hyt hyy m-o maa mab mac mah mam mao mat may mba mbb mbc mbh mbm mbo mbt mc- mca mcb mcc mch mcm mco mct mha mhc mhh mhm mho mht mma mmb mmc mmh mmm mmo mmt moa mob moc moh mom moo mot moy mta mtb mtc mth mtm mto mtt my- mya myb myc myh mym myo myt oaa oab oac oah oam oao oat ob- oba obb obc obh obm obo obt oby oc- oca ocb occ och ocm oco oct oha ohc ohh ohm oho oht om- oma omb omc omh omm omo omt omy oo- ooa oob ooc ooh oom ooo oot ot- ota otb otc oth otm oto ott oya oyo taa tab tac tah tam tao tat tay tba tbb tbc tbh tbm tbo tbt tca tcb tcc tch tcm tco tct th- tha thb thc thh thm tho tht thy tma tmb tmc tmh tmm tmo tmt tmy to- toa tob toc toh tom too tot toy tta ttb ttc tth ttm tto ttt tty tya tyc tym tyo tyt yaa yab yac yah yam yao yat yay ybc ybm yby yca ycc ych yco ycy yha yhc yht yma ymc ymm ymo ymt yob yoc yom yoo yot yoy yta ytc yth ytm yto ytt yyb yyc yyt yyy