a-a a-b a-c a-t a-z aaa aab aac aam aao aat aaz ab- aba abb abc abm abo abt abz ac- aca acb acc acm aco act acz ama amb amc amm amo amt amz aoa aob aoc aom aoo aot at- ata atb atc atm ato att atz az- aza azb azm azo azt azz baa bab bac bam bao bat baz bba bbb bbc bbm bbo bbt bca bcb bcc bcm bco bct bcz bma bmb bmc bmm bmo bmt bmz boa bob boc bom boo bot boz bta btb btc btm bto btt btz bza bzo bzz c-- caa cab cac cam cao cat caz cba cbb cbc cbm cbo cbt cbz cca ccb ccc ccm cco cct ccz cma cmb cmc cmm cmo cmt co- coa cob coc com coo cot coz cta ctb ctc ctm cto ctt ctz cz- czc czm czo czt m-o maa mab mac mam mao mat maz mba mbb mbc mbm mbo mbt mc- mca mcb mcc mcm mco mct mcz mma mmb mmc mmm mmo mmt mmz moa mob moc mom moo mot moz mta mtb mtc mtm mto mtt mza mzb mzm mzt oaa oab oac oam oao oat ob- oba obb obc obm obo obt oc- oca ocb occ ocm oco oct ocz om- oma omb omc omm omo omt omz oo- ooa oob ooc oom ooo oot ot- ota otb otc otm oto ott otz oza ozm ozo ozt ozz taa tab tac tam tao tat taz tba tbb tbc tbm tbo tbt tbz tca tcb tcc tcm tco tct tma tmb tmc tmm tmo tmt tmz to- toa tob toc tom too tot toz tta ttb ttc ttm tto ttt tza zaa zab zac zam zao zat zaz zbb zbc zbm zbt zco zma zmb zmc zmm zmt zo- zoa zob zoc zom zoo zot zta ztm zzt zzz