a-a a-b a-c aaa aab aac aae aah aan aau ab- aba abb abc abe abh abn abu ac- aca acb acc ace ach acn acu aea aeb aec aee aeh aen aeu aha ahb ahc ahe ahh ahn ahu an- ana anb anc ane anh ann anu au- aua aub auc aue auh aun b-u baa bab bac bae bah ban bau bba bbb bbc bbe bbh bbn bbu bca bcb bcc bce bch bcn bcu be- bea beb bec bee beh ben beu bha bhb bhc bhe bhh bhu bna bnb bnc bne bnn bnu bua bub buc bue buh bun buu c-- caa cab cac cae cah can cau cba cbb cbc cbe cbh cbn cbu cca ccb ccc cce cch ccn ccu ce- cea ceb cec cee ceh cen ceu ch- cha chb chc che chh chn chu cn- cna cnb cnc cne cnh cnn cnu cua cub cuc cue cuh cun cuu eaa eab eac eae eah ean eau eba ebb ebc ebe ebh ebn ebu ec- eca ecb ecc ece ech ecn ecu eea eeb eec eee een eha ehb ehc ehe ehh ehn ehu en- ena enb enc ene enh enn enu eu- eua eub euc eue eun haa hab hac hae hah han hau hba hbb hbc hbe hbh hbn hbu hca hcb hcc hce hch hcn he- hea heb hec hee heh hen heu hha hhb hhc hhe hhh hhn hhu hna hnb hnc hne hnh hnn hnu hua hub huc hue huh hun huu naa nab nac nae nah nan nau nba nbb nbc nbe nbn nbu nca ncb ncc nce nch ncn ncu ne- nea neb nec nee neh nen neu nha nhb nhc nhe nhh nhn nhu nna nnb nnc nne nnh nnn nnu nua nub nuc nue nuh nun nuu ua- uaa uab uac uae uah uan uau uba ubb ubc ube ubh ubn ubu uca ucb ucc uce uch ucn ucu uea ueb uec uee ueh uen uha uhb uhc uhe uhh uhu un- una unb unc une unh unn unu uua uuc uue uun uuu