a-a a-b a-q aaa aab aam aaq aar ab- aba abb abm abq abr ama amb amm amq amr aqa aqm aqr ar- ara arb arm arq arr baa bab bam baq bar bba bbb bbm bbq bbr bma bmb bmm bmq bmr bra brb brm brq brr m-r maa mab mam mar mba mbb mbm mbq mbr mma mmb mmm mmr mqa mqb mqr mra mrb mrm mrq mrr qaa qam qar qba qbq qma qmr qqq qra qrb qrm ra- raa rab ram raq rar rba rbb rbm rbr rma rmb rmm rmq rmr rqm rra rrb rrm rrq rrr