a-a a-b a-t aaa aab aam aao aar aat aay ab- aba abb abm abo abr abt aby ama amb amm amo amr amt amy aoa aob aom aoo aor aot ar- ara arb arm aro arr art ary at- ata atb atm ato atr att ay- aya ayo ayr ayt baa bab bam bao bar bat bay bba bbb bbm bbo bbr bbt bby bma bmb bmm bmo bmr bmt boa bob bom boo bor bot boy bra brb brm bro brr brt bry bta btb btm bto btr btt bty by- bya bym byo byr byt m-o m-r maa mab mam mao mar mat may mba mbb mbm mbo mbr mbt mma mmb mmm mmo mmr mmt moa mob mom moo mor mot moy mra mrb mrm mro mrr mrt mry mta mtb mtm mto mtr mtt my- mya myb mym myo myr myt oaa oab oam oao oar oat ob- oba obb obm obo obr obt oby om- oma omb omm omo omr omt omy oo- ooa oob oom ooo oor oot or- ora orb orm oro orr ort ory ot- ota otb otm oto otr ott oya oyo ra- raa rab ram rao rar rat ray rba rbb rbm rbo rbr rbt rma rmb rmm rmo rmr rmt roa rob rom roo ror rot roy rra rrb rrm rrr rrt rta rtb rtm rto rtr rtt rty ry- rya rym ryo ryr ryy taa tab tam tao tar tat tay tba tbb tbm tbo tbr tbt tma tmb tmm tmo tmr tmt tmy to- toa tob tom too tor tot toy tra trb trm tro trr trt try tta ttb ttm tto ttr ttt tty tya tym tyo tyr tyt yaa yab yam yao yar yat yay ybm ybr yby yma ymm ymo ymt yob yom yoo yor yot yoy yra yro yrt yta ytm yto ytr ytt yyb yyt yyy