a-a a-b a-c a-t aaa aab aac aam aao aar aat aay ab- aba abb abc abm abo abr abt aby ac- aca acb acc acm aco acr act acy ama amb amc amm amo amr amt amy aoa aob aoc aom aoo aor aot ar- ara arb arc arm aro arr art ary at- ata atb atc atm ato atr att ay- aya ayc ayo ayr ayt baa bab bac bam bao bar bat bay bba bbb bbc bbm bbo bbr bbt bby bca bcb bcc bcm bco bcr bct bcy bma bmb bmc bmm bmo bmr bmt boa bob boc bom boo bor bot boy bra brb brm bro brr brt bry bta btb btc btm bto btr btt bty by- bya byc bym byo byr byt c-- caa cab cac cam cao car cat cay cba cbb cbc cbm cbo cbr cbt cby cca ccb ccc ccm cco ccr cct cma cmb cmc cmm cmo cmr cmt cmy co- coa cob coc com coo cor cot coy cra crb crc crm cro crr crt cry cta ctb ctc ctm cto ctr ctt cty cya cyb cyc cym cyo cyr cyt m-o m-r maa mab mac mam mao mar mat may mba mbb mbc mbm mbo mbr mbt mc- mca mcb mcc mcm mco mcr mct mma mmb mmc mmm mmo mmr mmt moa mob moc mom moo mor mot moy mra mrb mrc mrm mro mrr mrt mry mta mtb mtc mtm mto mtr mtt my- mya myb myc mym myo myr myt oaa oab oac oam oao oar oat ob- oba obb obc obm obo obr obt oby oc- oca ocb occ ocm oco ocr oct om- oma omb omc omm omo omr omt omy oo- ooa oob ooc oom ooo oor oot or- ora orb orc orm oro orr ort ory ot- ota otb otc otm oto otr ott oya oyo ra- raa rab rac ram rao rar rat ray rba rbb rbc rbm rbo rbr rbt rca rcb rcc rcm rco rcr rct rma rmb rmc rmm rmo rmr rmt roa rob roc rom roo ror rot roy rra rrb rrc rrm rrr rrt rta rtb rtc rtm rto rtr rtt rty ry- rya ryc rym ryo ryr ryy taa tab tac tam tao tar tat tay tba tbb tbc tbm tbo tbr tbt tca tcb tcc tcm tco tcr tct tma tmb tmc tmm tmo tmr tmt tmy to- toa tob toc tom too tor tot toy tra trb trc trm tro trr trt try tta ttb ttc ttm tto ttr ttt tty tya tyc tym tyo tyr tyt yaa yab yac yam yao yar yat yay ybc ybm ybr yby yca ycc yco ycy yma ymc ymm ymo ymt yob yoc yom yoo yor yot yoy yra yrc yro yrt yta ytc ytm yto ytr ytt yyb yyc yyt yyy