a-a a-b a-c aaa aab aac aah aak aau aay ab- aba abb abc abh abk abu aby ac- aca acb acc ach ack acu acy aha ahb ahc ahh ahk ahu ahy aka akb akc akh akk aku au- aua aub auc auh auk ay- aya ayc ayh ayk ayu b-u baa bab bac bah bak bau bay bba bbb bbc bbh bbk bbu bby bca bcb bcc bch bck bcu bcy bha bhb bhc bhh bhk bhu bka bkb bkc bkk bua bub buc buh buk buu buy by- bya byc byh byk byu c-- caa cab cac cah cak cau cay cba cbb cbc cbh cbk cbu cby cca ccb ccc cch cck ccu ch- cha chb chc chh chk chu chy cka ckb ckc ckh cky cua cub cuc cuh cuk cuu cuy cya cyb cyc cyk haa hab hac hah hak hau hay hba hbb hbc hbh hbk hbu hby hca hcb hcc hch hck hcy hha hhb hhc hhh hhk hhu hhy hka hkb hkh hkk hku hua hub huc huh huk huu huy hy- hya hyb hyc hyh hyy ka- kaa kab kac kah kak kau kay kba kbb kbc kbh kbk kbu kca kcb kcc kch kck kcu kha khh khk khu kkb kkc kkh kkk kku kky kub kuc kuh kuk kuu kuy kya kyc kyu ua- uaa uab uac uah uak uau uay uba ubb ubc ubh ubk ubu uby uca ucb ucc uch uck ucu uha uhb uhc uhh uhu uhy uka ukb ukc ukk uku uua uuc uuu uyc uyu yaa yab yac yah yak yau yay ybc yby yca ycc ych ycu ycy yha yhc yhu yka ykk yua yuh yuk yuu yuy yyb yyc yyu yyy