a-a a-b a-c a-t aaa aab aac aam aao aat aau ab- aba abb abc abm abo abt abu ac- aca acb acc acm aco act acu ama amb amc amm amo amt amu aoa aob aoc aom aoo aot aou at- ata atb atc atm ato att atu au- aua aub auc aum auo aut b-u baa bab bac bam bao bat bau bba bbb bbc bbm bbo bbt bbu bca bcb bcc bcm bco bct bcu bma bmb bmc bmm bmo bmt bmu boa bob boc bom boo bot bou bta btb btc btm bto btt btu bua bub buc bum buo but buu c-- caa cab cac cam cao cat cau cba cbb cbc cbm cbo cbt cbu cca ccb ccc ccm cco cct ccu cma cmb cmc cmm cmo cmt cmu co- coa cob coc com coo cot cou cta ctb ctc ctm cto ctt ctu cua cub cuc cum cuo cut cuu m-o maa mab mac mam mao mat mau mba mbb mbc mbm mbo mbt mbu mc- mca mcb mcc mcm mco mct mcu mma mmb mmc mmm mmo mmt mmu moa mob moc mom moo mot mou mta mtb mtc mtm mto mtt mtu mua mub muc mum mut muu oaa oab oac oam oao oat oau ob- oba obb obc obm obo obt obu oc- oca ocb occ ocm oco oct ocu om- oma omb omc omm omo omt omu oo- ooa oob ooc oom ooo oot ot- ota otb otc otm oto ott otu ou- oua ouc oum ouo out taa tab tac tam tao tat tau tba tbb tbc tbm tbo tbt tbu tca tcb tcc tcm tco tct tcu tma tmb tmc tmm tmo tmt tmu to- toa tob toc tom too tot tou tta ttb ttc ttm tto ttt ttu tua tub tuc tum tuo tut tuu ua- uaa uab uac uam uao uat uau 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 uua uuc uum uut uuu