a-a a-b aaa aab aam aao aar aav aay ab- aba abb abm abo abr abv aby ama amb amm amo amr amv amy aoa aob aom aoo aor aov ar- ara arb arm aro arr arv ary av- ava avb avm avo avr avy ay- aya ayo ayr baa bab bam bao bar bav bay bba bbb bbm bbo bbr bby bma bmb bmm bmo bmr bmv boa bob bom boo bor bov boy bra brb brm bro brr brv bry bva bvb bvm bvo bvr bvv by- bya bym byo byr m-o m-r m-v maa mab mam mao mar mav may mba mbb mbm mbo mbr mbv mma mmb mmm mmo mmr mmv moa mob mom moo mor mov moy mra mrb mrm mro mrr mrv mry mva mvb mvm mvo mvr mvv mvy my- mya myb mym myo myr myv oaa oab oam oao oar oav ob- oba obb obm obo obr obv oby om- oma omb omm omo omr omv omy oo- ooa oob oom ooo oor oov or- ora orb orm oro orr orv ory ov- ova ovb ovo ovv oya oyo ra- raa rab ram rao rar rav ray rba rbb rbm rbo rbr rma rmb rmm rmo rmr rmv roa rob rom roo ror rov roy rra rrb rrm rrr rva rvb rvm rvo rvr rvv rvy ry- rya rym ryo ryr ryy v-a vaa vab vam vao var vav vay vba vbm vbo vbr vbv vm- vma vmm vmo vmr voa vob vom voo vor vov voy vra vrb vrm vrr vry vva vvb vvm vvo vvr vvv vym yaa yab yam yao yar yav yay ybm ybr yby yma ymm ymo yob yom yoo yor yoy yra yro yva yvo yvr yvy yyb yyy