a-a a-b a-c aaa aab aac aah aam aan aau ab- aba abb abc abh abm abn abu ac- aca acb acc ach acm acn acu aha ahb ahc ahh ahm ahn ahu ama amb amc amh amm amn amu an- ana anb anc anh anm ann anu au- aua aub auc auh aum aun b-u baa bab bac bah bam ban bau bba bbb bbc bbh bbm bbn bbu bca bcb bcc bch bcm bcn bcu bha bhb bhc bhh bhm bhu bma bmb bmc bmh bmm bmn bmu bna bnb bnc bnn bnu bua bub buc buh bum bun buu c-- caa cab cac cah cam can cau cba cbb cbc cbh cbm cbn cbu cca ccb ccc cch ccm ccn ccu ch- cha chb chc chh chm chn chu cma cmb cmc cmh cmm cmn cmu cn- cna cnb cnc cnh cnm cnn cnu cua cub cuc cuh cum cun cuu haa hab hac hah ham han hau hba hbb hbc hbh hbm hbn hbu hca hcb hcc hch hcm hcn hha hhb hhc hhh hhm hhn hhu hma hmb hmc hmh hmm hmu hna hnb hnc hnh hnn hnu hua hub huc huh hum hun huu maa mab mac mah mam man mau mba mbb mbc mbh mbm mbu mc- mca mcb mcc mch mcm mcn mcu mha mhc mhh mhm mhn mhu mma mmb mmc mmh mmm mmn mmu mna mnb mnc mnm mnn mnu mua mub muc muh mum mun muu naa nab nac nah nam nan nau nba nbb nbc nbm nbn nbu nca ncb ncc nch ncm ncn ncu nha nhb nhc nhh nhm nhn nhu nma nmb nmc nmh nmm nmn nmu nna nnb nnc nnh nnm nnn nnu nua nub nuc nuh num nun nuu ua- uaa uab uac uah uam uan uau uba ubb ubc ubh ubn ubu uca ucb ucc uch ucm ucn ucu uha uhb uhc uhh uhm uhu um- uma umb umc umh umm umn umu un- una unb unc unh unm unn unu uua uuc uum uun uuu