a-a a-b aaa aab aah aam aan aao aar ab- aba abb abh abm abn abo abr aha ahb ahh ahm ahn aho ahr ama amb amh amm amn amo amr an- ana anb anh anm ann ano anr aoa aob aoh aom aon aoo aor ar- ara arb arh arm arn aro arr baa bab bah bam ban bao bar bba bbb bbh bbm bbn bbo bbr bha bhb bhh bhm bho bhr bma bmb bmh bmm bmn bmo bmr bna bnb bnn bno bnr boa bob boh bom bon boo bor bra brb brh brm brn bro brr haa hab hah ham han hao har hba hbb hbh hbm hbn hbo hbr hha hhb hhh hhm hhn hho hhr hma hmb hmh hmm hmo hmr hna hnb hnh hnn hno hoa hob hoh hom hon hoo hor hr- hra hrb hrh hrm hrn hro hrr m-o m-r maa mab mah mam man mao mar mba mbb mbh mbm mbo mbr mha mhh mhm mhn mho mhr mma mmb mmh mmm mmn mmo mmr mna mnb mnm mnn mno mnr moa mob moh mom mon moo mor mra mrb mrh mrm mrn mro mrr naa nab nah nam nan nao nar nba nbb nbm nbn nbo nbr nha nhb nhh nhm nhn nhr nma nmb nmh nmm nmn nmo nmr nna nnb nnh nnm nnn nno no- noa nob noh nom non noo nor nra nrb nrm nrn nro nrr oaa oab oah oam oan oao oar ob- oba obb obh obm obn obo obr oha ohh ohm ohn oho ohr om- oma omb omh omm omn omo omr on- ona onb onh onn ono onr oo- ooa oob ooh oom oon ooo oor or- ora orb orh orm orn oro orr ra- raa rab rah ram ran rao rar rba rbb rbh rbm rbn rbo rbr rh- rha rhb rhh rhm rhn rho rhr rma rmb rmh rmm rmn rmo rmr rna rnb rnh rnm rnn rno rnr roa rob roh rom ron roo ror rra rrb rrh rrm rrn rrr