a-a a-b aaa aab aam aan aao aar aav ab- aba abb abm abn abo abr abv ama amb amm amn amo amr amv an- ana anb anm ann ano anr anv aoa aob aom aon aoo aor aov ar- ara arb arm arn aro arr arv av- ava avb avm avn avo avr baa bab bam ban bao bar bav bba bbb bbm bbn bbo bbr bma bmb bmm bmn bmo bmr bmv bna bnb bnn bno bnr bnv boa bob bom bon boo bor bov bra brb brm brn bro brr brv bva bvb bvm bvn bvo bvr bvv m-o m-r m-v maa mab mam man mao mar mav mba mbb mbm mbo mbr mbv mma mmb mmm mmn mmo mmr mmv mna mnb mnm mnn mno mnr moa mob mom mon moo mor mov mra mrb mrm mrn mro mrr mrv mva mvb mvm mvn mvo mvr mvv naa nab nam nan nao nar nav nba nbb nbm nbn nbo nbr nbv nma nmb nmm nmn nmo nmr nna nnb nnm nnn nno nnv no- noa nob nom non noo nor nov nra nrb nrm nrn nro nrr nrv nva nvb nvm nvn nvv oaa oab oam oan oao oar oav ob- oba obb obm obn obo obr obv om- oma omb omm omn omo omr omv on- ona onb onn ono onr oo- ooa oob oom oon ooo oor oov or- ora orb orm orn oro orr orv ov- ova ovb ovo ovv ra- raa rab ram ran rao rar rav rba rbb rbm rbn rbo rbr rma rmb rmm rmn rmo rmr rmv rna rnb rnm rnn rno rnr rnv roa rob rom ron roo ror rov rra rrb rrm rrn rrr rva rvb rvm rvn rvo rvr rvv v-a vaa vab vam van vao var vav vba vbm vbo vbr vbv vm- vma vmm vmn vmo vmr vn- vna vnm vno vnr vnv voa vob vom von voo vor vov vra vrb vrm vrn vrr vva vvb vvm vvo vvr vvv