a-a a-b a-t aaa aab aam aar aat aay ab- aba abb abm abr abt aby ama amb amm amr amt amy ar- ara arb arm arr art ary at- ata atb atm atr att ay- aya ayr ayt baa bab bam bar bat bay bba bbb bbm bbr bbt bby bma bmb bmm bmr bmt bra brb brm brr brt bry bta btb btm btr btt bty by- bya bym byr byt m-r maa mab mam mar mat may mba mbb mbm mbr mbt mma mmb mmm mmr mmt mra mrb mrm mrr mrt mry mta mtb mtm mtr mtt my- mya myb mym myr myt ra- raa rab ram rar rat ray rba rbb rbm rbr rbt rma rmb rmm rmr rmt rra rrb rrm rrr rrt rta rtb rtm rtr rtt rty ry- rya rym ryr ryy taa tab tam tar tat tay tba tbb tbm tbr tbt tma tmb tmm tmr tmt tmy tra trb trm trr trt try tta ttb ttm ttr ttt tty tya tym tyr tyt yaa yab yam yar yat yay ybm ybr yby yma ymm ymt yra yrt yta ytm ytr ytt yyb yyt yyy