a-a a-b a-c aaa aab aac aah aan aau aay ab- aba abb abc abh abn abu aby ac- aca acb acc ach acn acu acy aha ahb ahc ahh ahn ahu ahy an- ana anb anc anh ann anu any au- aua aub auc auh aun ay- aya ayc ayh ayn ayu b-u baa bab bac bah ban bau bay bba bbb bbc bbh bbn bbu bby bca bcb bcc bch bcn bcu bcy bha bhb bhc bhh bhu bna bnb bnc bnn bnu bua bub buc buh bun buu buy by- bya byc byh byn byu c-- caa cab cac cah can cau cay cba cbb cbc cbh cbn cbu cby cca ccb ccc cch ccn ccu ch- cha chb chc chh chn chu chy cn- cna cnb cnc cnh cnn cnu cny cua cub cuc cuh cun cuu cuy cya cyb cyc cyn haa hab hac hah han hau hay hba hbb hbc hbh hbn hbu hby hca hcb hcc hch hcn hcy hha hhb hhc hhh hhn hhu hhy hna hnb hnc hnh hnn hnu hny hua hub huc huh hun huu huy hy- hya hyb hyc hyh hyn hyy naa nab nac nah nan nau nay nba nbb nbc nbn nbu nca ncb ncc nch ncn ncu nha nhb nhc nhh nhn nhu nhy nna nnb nnc nnh nnn nnu nua nub nuc nuh nun nuu nuy nya nyc nyn nyu nyy ua- uaa uab uac uah uan uau uay uba ubb ubc ubh ubn ubu uby uca ucb ucc uch ucn ucu uha uhb uhc uhh uhu uhy un- una unb unc unh unn unu uny uua uuc uun uuu uyc uyu yaa yab yac yah yan yau yay ybc yby yca ycc ych ycu ycy yha yhc yhu yna ynn ynu yny yua yuh yun yuu yuy yyb yyc yyu yyy