-ic a-a a-b a-c a-i aaa aab aac aah aai aay ab- aba abb abc abh abi aby ac- aca acb acc ach aci acy aha ahb ahc ahh ahi ahy ai- aia aib aic aih aii aiy ay- aya ayc ayh ayi baa bab bac bah bai bay bba bbb bbc bbh bbi bby bca bcb bcc bch bci bcy bha bhb bhc bhh bhi bi- bia bib bic bih bii biy by- bya byc byh byi c-- caa cab cac cah cai cay cba cbb cbc cbh cbi cby cca ccb ccc cch cci ch- cha chb chc chh chi chy ci- cia cib cic cih cii cya cyb cyc h-i haa hab hac hah hai hay hba hbb hbc hbh hbi hby hca hcb hcc hch hci hcy hha hhb hhc hhh hhi hhy hia hib hic hih hii hy- hya hyb hyc hyh hyi hyy ia- iaa iab iac iah iai iba ibb ibc ibh ibi iby ica icb icc ich ici icy iha ihb ihc ihh ihi ihy iia iib iic iih iii iya iyc iyy yaa yab yac yah yai yay ybc ybi yby yca ycc ych yci ycy yha yhc yhi yih yii yyb yyc yyy