a-a a-b a-z aaa aab aam aao aar aay aaz ab- aba abb abm abo abr aby abz ama amb amm amo amr amy amz aoa aob aom aoo aor ar- ara arb arm aro arr ary arz ay- aya ayo ayr ayz az- aza azb azm azo azy azz baa bab bam bao bar bay baz bba bbb bbm bbo bbr bby bma bmb bmm bmo bmr bmz boa bob bom boo bor boy boz bra brb brm bro brr bry brz by- bya bym byo byr byz bza bzo bzr bzz m-o m-r maa mab mam mao mar may maz mba mbb mbm mbo mbr mma mmb mmm mmo mmr mmz moa mob mom moo mor moy moz mra mrb mrm mro mrr mry mrz my- mya myb mym myo myr mza mzb mzm oaa oab oam oao oar ob- oba obb obm obo obr oby om- oma omb omm omo omr omy omz oo- ooa oob oom ooo oor or- ora orb orm oro orr ory orz oya oyo oza ozm ozo ozz ra- raa rab ram rao rar ray raz rba rbb rbm rbo rbr rma rmb rmm rmo rmr roa rob rom roo ror roy roz rra rrb rrm rrr ry- rya rym ryo ryr ryy ryz rza rzb rzm rzo rzy yaa yab yam yao yar yay yaz ybm ybr yby ybz yma ymm ymo yob yom yoo yor yoy yra yro yyb yyy yyz yzb yzr yzy zaa zab zam zao zar zay zaz zbb zbm zbr zby zma zmb zmm zo- zoa zob zom zoo zor zro zym zzr zzy zzz