a-a a-b a-c aaa aab aac aak aam aan aau ab- aba abb abc abk abm abn abu ac- aca acb acc ack acm acn acu aka akb akc akk akm akn aku ama amb amc amk amm amn amu an- ana anb anc ank anm ann anu au- aua aub auc auk aum aun b-u baa bab bac bak bam ban bau bba bbb bbc bbk bbm bbn bbu bca bcb bcc bck bcm bcn bcu bka bkb bkc bkk bkm bkn bma bmb bmc bmk bmm bmn bmu bna bnb bnc bnk bnn bnu bua bub buc buk bum bun buu c-- caa cab cac cak cam can cau cba cbb cbc cbk cbm cbn cbu cca ccb ccc cck ccm ccn ccu cka ckb ckc ckm cma cmb cmc cmk cmm cmn cmu cn- cna cnb cnc cnm cnn cnu cua cub cuc cuk cum cun cuu ka- kaa kab kac kak kam kan kau kba kbb kbc kbk kbm kbn kbu kca kcb kcc kck kcm kcn kcu kkb kkc kkk kkm kkn kku kma kmb kmc kmk kmm kmu kn- kna knc knk knm knn knu kub kuc kuk kum kun kuu maa mab mac mak mam man mau mba mbb mbc mbk mbm mbu mc- mca mcb mcc mck mcm mcn mcu mka mkb mkc mkk mkm mkn mku mma mmb mmc mmk mmm mmn mmu mna mnb mnc mnk mnm mnn mnu mua mub muc muk mum mun muu naa nab nac nak nam nan nau nba nbb nbc nbk nbm nbn nbu nca ncb ncc nck ncm ncn ncu nka nkc nkk nkm nkn nku nma nmb nmc nmk nmm nmn nmu nna nnb nnc nnk nnm nnn nnu nua nub nuc nuk num nun nuu ua- uaa uab uac uak uam uan uau uba ubb ubc ubk ubn ubu uca ucb ucc uck ucm ucn ucu uka ukb ukc ukk ukn uku um- uma umb umc umm umn umu un- una unb unc unk unm unn unu uua uuc uum uun uuu