a-a a-b a-c aaa aab aac aah aan aau aav ab- aba abb abc abh abn abu abv ac- aca acb acc ach acn acu acv aha ahb ahc ahh ahn ahu ahv an- ana anb anc anh ann anu anv au- aua aub auc auh aun auv av- ava avb avc avh avn avu b-u baa bab bac bah ban bau bav bba bbb bbc bbh bbn bbu bca bcb bcc bch bcn bcu bcv bha bhb bhc bhh bhu bhv bna bnb bnc bnn bnu bnv bua bub buc buh bun buu bva bvb bvc bvh bvn bvu bvv c-- caa cab cac cah can cau cav cba cbb cbc cbh cbn cbu cbv cca ccb ccc cch ccn ccu ccv ch- cha chb chc chh chn chu chv cn- cna cnb cnc cnh cnn cnu cnv cua cub cuc cuh cun cuu cuv cva cvb cvc cvh cvn cvu cvv haa hab hac hah han hau hav hba hbb hbc hbh hbn hbu hbv hca hcb hcc hch hcn hcv hha hhb hhc hhh hhn hhu hhv hna hnb hnc hnh hnn hnu hnv hua hub huc huh hun huu huv hv- hva hvb hvc hvn hvv naa nab nac nah nan nau nav nba nbb nbc nbn nbu nbv nca ncb ncc nch ncn ncu ncv nha nhb nhc nhh nhn nhu nhv nna nnb nnc nnh nnn nnu nnv nua nub nuc nuh nun nuu nuv nva nvb nvc nvh nvn nvu nvv ua- uaa uab uac uah uan uau uav uba ubb ubc ubh ubn ubu ubv uca ucb ucc uch ucn ucu ucv uha uhb uhc uhh uhu uhv un- una unb unc unh unn unu unv uua uuc uun uuu uva uvb uvc uvu uvv v-a vaa vab vac vah van vau vav vba vbc vbh vbv vca vcc vch vcn vcu vh- vha vhb vhc vn- vna vnu vnv vuv vva vvb vvc vvv