a-a a-b a-c aaa aab aac aah aau aay ab- aba abb abc abh abu aby ac- aca acb acc ach acu acy aha ahb ahc ahh ahu ahy au- aua aub auc auh ay- aya ayc ayh ayu b-u baa bab bac bah bau bay bba bbb bbc bbh bbu bby bca bcb bcc bch bcu bcy bha bhb bhc bhh bhu bua bub buc buh buu buy by- bya byc byh byu c-- caa cab cac cah cau cay cba cbb cbc cbh cbu cby cca ccb ccc cch ccu ch- cha chb chc chh chu chy cua cub cuc cuh cuu cuy cya cyb cyc haa hab hac hah hau hay hba hbb hbc hbh hbu hby hca hcb hcc hch hcy hha hhb hhc hhh hhu hhy hua hub huc huh huu huy hy- hya hyb hyc hyh hyy ua- uaa uab uac uah uau uay uba ubb ubc ubh ubu uby uca ucb ucc uch ucu uha uhb uhc uhh uhu uhy uua uuc uuu uyc uyu yaa yab yac yah yau yay ybc yby yca ycc ych ycu ycy yha yhc yhu yua yuh yuu yuy yyb yyc yyu yyy