a-a a-b a-c a-t aaa aab aac aam aao aat aay ab- aba abb abc abm abo abt aby ac- aca acb acc acm aco act acy ama amb amc amm amo amt amy aoa aob aoc aom aoo aot at- ata atb atc atm ato att ay- aya ayc ayo ayt baa bab bac bam bao bat bay bba bbb bbc bbm bbo bbt bby bca bcb bcc bcm bco bct bcy bma bmb bmc bmm bmo bmt boa bob boc bom boo bot boy bta btb btc btm bto btt bty by- bya byc bym byo byt c-- caa cab cac cam cao cat cay cba cbb cbc cbm cbo cbt cby cca ccb ccc ccm cco cct cma cmb cmc cmm cmo cmt cmy co- coa cob coc com coo cot coy cta ctb ctc ctm cto ctt cty cya cyb cyc cym cyo cyt m-o maa mab mac mam mao mat may mba mbb mbc mbm mbo mbt mc- mca mcb mcc mcm mco mct mma mmb mmc mmm mmo mmt moa mob moc mom moo mot moy mta mtb mtc mtm mto mtt my- mya myb myc mym myo myt oaa oab oac oam oao oat ob- oba obb obc obm obo obt oby oc- oca ocb occ ocm oco oct om- oma omb omc omm omo omt omy oo- ooa oob ooc oom ooo oot ot- ota otb otc otm oto ott oya oyo taa tab tac tam tao tat tay tba tbb tbc tbm tbo tbt tca tcb tcc tcm tco tct tma tmb tmc tmm tmo tmt tmy to- toa tob toc tom too tot toy tta ttb ttc ttm tto ttt tty tya tyc tym tyo tyt yaa yab yac yam yao yat yay ybc ybm yby yca ycc yco ycy yma ymc ymm ymo ymt yob yoc yom yoo yot yoy yta ytc ytm yto ytt yyb yyc yyt yyy