a-a a-b a-c a-t aaa aab aac aam aat aau ab- aba abb abc abm abt abu ac- aca acb acc acm act acu ama amb amc amm amt amu at- ata atb atc atm att atu au- aua aub auc aum aut b-u baa bab bac bam bat bau bba bbb bbc bbm bbt bbu bca bcb bcc bcm bct bcu bma bmb bmc bmm bmt bmu bta btb btc btm btt btu bua bub buc bum but buu c-- caa cab cac cam cat cau cba cbb cbc cbm cbt cbu cca ccb ccc ccm cct ccu cma cmb cmc cmm cmt cmu cta ctb ctc ctm ctt ctu cua cub cuc cum cut cuu maa mab mac mam mat mau mba mbb mbc mbm mbt mbu mc- mca mcb mcc mcm mct mcu mma mmb mmc mmm mmt mmu mta mtb mtc mtm mtt mtu mua mub muc mum mut muu taa tab tac tam tat tau tba tbb tbc tbm tbt tbu tca tcb tcc tcm tct tcu tma tmb tmc tmm tmt tmu tta ttb ttc ttm ttt ttu tua tub tuc tum tut tuu ua- uaa uab uac uam uat uau uba ubb ubc ubt ubu uca ucb ucc ucm uct ucu um- uma umb umc umm umt umu uta utb utc utm utt utu uua uuc uum uut uuu