-ic a-a a-b a-c a-i aaa aab aac aah aai aar aay ab- aba abb abc abh abi abr aby ac- aca acb acc ach aci acr acy aha ahb ahc ahh ahi ahr ahy ai- aia aib aic aih aii air aiy ar- ara arb arc arh ari arr ary ay- aya ayc ayh ayi ayr baa bab bac bah bai bar bay bba bbb bbc bbh bbi bbr bby bca bcb bcc bch bci bcr bcy bha bhb bhc bhh bhi bhr bi- bia bib bic bih bii bir biy bra brb brh bri brr bry by- bya byc byh byi byr c-- caa cab cac cah cai car cay cba cbb cbc cbh cbi cbr cby cca ccb ccc cch cci ccr ch- cha chb chc chh chi chr chy ci- cia cib cic cih cii cir cra crb crc crh cri crr cry cya cyb cyc cyr h-i haa hab hac hah hai har hay hba hbb hbc hbh hbi hbr hby hca hcb hcc hch hci hcr hcy hha hhb hhc hhh hhi hhr hhy hia hib hic hih hii hir hr- hra hrb hrc hrh hri hrr hy- hya hyb hyc hyh hyi hyr hyy ia- iaa iab iac iah iai iar iba ibb ibc ibh ibi ibr iby ica icb icc ich ici icr icy iha ihb ihc ihh ihi ihr ihy iia iib iic iih iii iir ir- ira irb irc iri irr iry iya iyc iyr iyy ra- raa rab rac rah rai rar ray rba rbb rbc rbh rbi rbr rca rcb rcc rch rci rcr rh- rha rhb rhc rhh rhi rhr ria rib ric rih rii rir riy rra rrb rrc rrh rri rrr ry- rya ryc ryr ryy yaa yab yac yah yai yar yay ybc ybi ybr yby yca ycc ych yci ycy yha yhc yhi yih yii yir yra yrc yyb yyc yyy