a-a a-b a-c a-t aaa aab aac aam aan aao aat ab- aba abb abc abm abn abo abt ac- aca acb acc acm acn aco act ama amb amc amm amn amo amt an- ana anb anc anm ann ano ant aoa aob aoc aom aon aoo aot at- ata atb atc atm atn ato att baa bab bac bam ban bao bat bba bbb bbc bbm bbn bbo bbt bca bcb bcc bcm bcn bco bct bma bmb bmc bmm bmn bmo bmt bna bnb bnc bnn bno bnt boa bob boc bom bon boo bot bta btb btc btm btn bto btt c-- caa cab cac cam can cao cat cba cbb cbc cbm cbn cbo cbt cca ccb ccc ccm ccn cco cct cma cmb cmc cmm cmn cmo cmt cn- cna cnb cnc cnm cnn cno cnt co- coa cob coc com con coo cot cta ctb ctc ctm ctn cto ctt m-o maa mab mac mam man mao mat mba mbb mbc mbm mbo mbt mc- mca mcb mcc mcm mcn mco mct mma mmb mmc mmm mmn mmo mmt mna mnb mnc mnm mnn mno mnt moa mob moc mom mon moo mot mta mtb mtc mtm mtn mto mtt naa nab nac nam nan nao nat nba nbb nbc nbm nbn nbo nbt nca ncb ncc ncm ncn nco nct nma nmb nmc nmm nmn nmo nmt nna nnb nnc nnm nnn nno nnt no- noa nob noc nom non noo not nta ntb ntc ntm ntn nto ntt oaa oab oac oam oan oao oat ob- oba obb obc obm obn obo obt oc- oca ocb occ ocm ocn oco oct om- oma omb omc omm omn omo omt on- ona onb onc onn ono ont oo- ooa oob ooc oom oon ooo oot ot- ota otb otc otm otn oto ott taa tab tac tam tan tao tat tba tbb tbc tbm tbn tbo tbt tca tcb tcc tcm tcn tco tct tma tmb tmc tmm tmn tmo tmt tna tnb tnc tnm tnn tno tnt to- toa tob toc tom ton too tot tta ttb ttc ttm ttn tto ttt