a-a a-b a-c a-t aaa aab aac aak aam aao aat aau ab- aba abb abc abk abm abo abt abu ac- aca acb acc ack acm aco act acu aka akb akc akk akm ako aku ama amb amc amk amm amo amt amu aoa aob aoc aok aom aoo aot aou at- ata atb atc atm ato att atu au- aua aub auc auk aum auo aut b-u baa bab bac bak bam bao bat bau bba bbb bbc bbk bbm bbo bbt bbu bca bcb bcc bck bcm bco bct bcu bka bkb bkc bkk bkm bko bkt bma bmb bmc bmk bmm bmo bmt bmu boa bob boc bok bom boo bot bou bta btb btc btk btm bto btt btu bua bub buc buk bum buo but buu c-- caa cab cac cak cam cao cat cau cba cbb cbc cbk cbm cbo cbt cbu cca ccb ccc cck ccm cco cct ccu cka ckb ckc ckm cko ckt cma cmb cmc cmk cmm cmo cmt cmu co- coa cob coc cok com coo cot cou cta ctb ctc ctk ctm cto ctt ctu cua cub cuc cuk cum cuo cut cuu k-t ka- kaa kab kac kak kam kao kat kau kba kbb kbc kbk kbm kbo kbu kca kcb kcc kck kcm kct kcu kkb kkc kkk kkm kkt kku kma kmb kmc kmk kmm kmo kmt kmu koa kob koc kok kom koo kot kou kta ktb ktc ktk ktm kto ktt ktu kub kuc kuk kum kut kuu m-o maa mab mac mak mam mao mat mau mba mbb mbc mbk mbm mbo mbt mbu mc- mca mcb mcc mck mcm mco mct mcu mka mkb mkc mkk mkm mko mkt mku mma mmb mmc mmk mmm mmo mmt mmu moa mob moc mok mom moo mot mou mta mtb mtc mtk mtm mto mtt mtu mua mub muc muk mum mut muu oaa oab oac oak oam oao oat oau ob- oba obb obc obk obm obo obt obu oc- oca ocb occ ock ocm oco oct ocu oka okb okc okk oko oku om- oma omb omc omm omo omt omu oo- ooa oob ooc ook oom ooo oot ot- ota otb otc otk otm oto ott otu ou- oua ouc ouk oum ouo out taa tab tac tak tam tao tat tau tba tbb tbc tbk tbm tbo tbt tbu tca tcb tcc tck tcm tco tct tcu tka tkb tkc tkk tkm tko tkt tma tmb tmc tmk tmm tmo tmt tmu to- toa tob toc tok tom too tot tou tta ttb ttc ttk ttm tto ttt ttu tua tub tuc tuk tum tuo tut tuu ua- uaa uab uac uak uam uao uat uau uba ubb ubc ubk ubo ubt ubu uca ucb ucc uck ucm uco uct ucu uka ukb ukc ukk uku um- uma umb umc umm umo umt umu uoa uob uoc uok uom uoo uot uta utb utc utk utm uto utt utu uua uuc uum uut uuu