a-a a-b a-c aaa aab aac aae aah aak aan aau ab- aba abb abc abe abh abk abn abu ac- aca acb acc ace ach ack acn acu aea aeb aec aee aeh aek aen aeu aha ahb ahc ahe ahh ahk ahn ahu aka akb akc ake akh akk akn aku an- ana anb anc ane anh ank ann anu au- aua aub auc aue auh auk aun b-u baa bab bac bae bah bak ban bau bba bbb bbc bbe bbh bbk bbn bbu bca bcb bcc bce bch bck bcn bcu be- bea beb bec bee beh bek ben beu bha bhb bhc bhe bhh bhk bhu bka bkb bkc bke bkk bkn bna bnb bnc bne bnk bnn bnu bua bub buc bue buh buk bun buu c-- caa cab cac cae cah cak can cau cba cbb cbc cbe cbh cbk cbn cbu cca ccb ccc cce cch cck ccn ccu ce- cea ceb cec cee ceh cek cen ceu ch- cha chb chc che chh chk chn chu cka ckb ckc ckh cn- cna cnb cnc cne cnh cnn cnu cua cub cuc cue cuh cuk cun cuu eaa eab eac eae eah eak ean eau eba ebb ebc ebe ebh ebk ebn ebu ec- eca ecb ecc ece ech eck ecn ecu eea eeb eec eee eek een eha ehb ehc ehe ehh ehn ehu eka ekb ekc eke ekh eku en- ena enb enc ene enh enk enn enu eu- eua eub euc eue eun haa hab hac hae hah hak han hau hba hbb hbc hbe hbh hbk hbn hbu hca hcb hcc hce hch hck hcn he- hea heb hec hee heh hek hen heu hha hhb hhc hhe hhh hhk hhn hhu hka hkb hkh hkk hkn hku hna hnb hnc hne hnh hnk hnn hnu hua hub huc hue huh huk hun huu ka- kaa kab kac kae kah kak kan kau kba kbb kbc kbe kbh kbk kbn kbu kca kcb kcc kce kch kck kcn kcu ke- kea keb kec kee keh kek ken kha khe khh khk khn khu kkb kkc kke kkh kkk kkn kku kn- kna knc kne knk knn knu kub kuc kue kuh kuk kun kuu naa nab nac nae nah nak nan nau nba nbb nbc nbe nbk nbn nbu nca ncb ncc nce nch nck ncn ncu ne- nea neb nec nee neh nek nen neu nha nhb nhc nhe nhh nhk nhn nhu nka nkc nke nkk nkn nku nna nnb nnc nne nnh nnk nnn nnu nua nub nuc nue nuh nuk nun nuu ua- uaa uab uac uae uah uak uan uau uba ubb ubc ube ubh ubk ubn ubu uca ucb ucc uce uch uck ucn ucu uea ueb uec uee ueh uen uha uhb uhc uhe uhh uhu uka ukb ukc uke ukk ukn uku un- una unb unc une unh unk unn unu uua uuc uue uun uuu