a-a a-b a-c a-t a-z aaa aab aac aam aao aat aau aaz ab- aba abb abc abm abo abt abu abz ac- aca acb acc acm aco act acu acz ama amb amc amm amo amt amu amz aoa aob aoc aom aoo aot aou at- ata atb atc atm ato att atu atz au- aua aub auc aum auo aut auz az- aza azb azm azo azt azu azz b-u baa bab bac bam bao bat bau baz bba bbb bbc bbm bbo bbt bbu bca bcb bcc bcm bco bct bcu bcz bma bmb bmc bmm bmo bmt bmu bmz boa bob boc bom boo bot bou boz bta btb btc btm bto btt btu btz bua bub buc bum buo but buu buz bza bzo bzu bzz c-- caa cab cac cam cao cat cau caz cba cbb cbc cbm cbo cbt cbu cbz cca ccb ccc ccm cco cct ccu ccz cma cmb cmc cmm cmo cmt cmu co- coa cob coc com coo cot cou coz cta ctb ctc ctm cto ctt ctu ctz cua cub cuc cum cuo cut cuu cuz cz- czc czm czo czt m-o maa mab mac mam mao mat mau maz mba mbb mbc mbm mbo mbt mbu mc- mca mcb mcc mcm mco mct mcu mcz mma mmb mmc mmm mmo mmt mmu mmz moa mob moc mom moo mot mou moz mta mtb mtc mtm mto mtt mtu mua mub muc mum mut muu mza mzb mzm mzt oaa oab oac oam oao oat oau ob- oba obb obc obm obo obt obu oc- oca ocb occ ocm oco oct ocu ocz om- oma omb omc omm omo omt omu omz oo- ooa oob ooc oom ooo oot ot- ota otb otc otm oto ott otu otz ou- oua ouc oum ouo out oza ozm ozo ozt ozu ozz taa tab tac tam tao tat tau taz tba tbb tbc tbm tbo tbt tbu tbz tca tcb tcc tcm tco tct tcu tma tmb tmc tmm tmo tmt tmu tmz to- toa tob toc tom too tot tou toz tta ttb ttc ttm tto ttt ttu tua tub tuc tum tuo tut tuu tuz tza tzu ua- uaa uab uac uam uao uat uau uaz uba ubb ubc ubo ubt ubu uca ucb ucc ucm uco uct ucu um- uma umb umc umm umo umt umu uoa uob uoc uom uoo uot uta utb utc utm uto utt utu utz uua uuc uum uut uuu uza uzb uzo uzu zaa zab zac zam zao zat zaz zbb zbc zbm zbt zco zma zmb zmc zmm zmt zo- zoa zob zoc zom zoo zot zou zta ztm zub zuc zum zut zuz zzt zzz