-ic a-a a-b a-c a-i aaa aab aac aai aak aar aay ab- aba abb abc abi abk abr aby ac- aca acb acc aci ack acr acy ai- aia aib aic aii aik air aiy aka akb akc aki akk akr ar- ara arb arc ari ark arr ary ay- aya ayc ayi ayk ayr baa bab bac bai bak bar bay bba bbb bbc bbi bbk bbr bby bca bcb bcc bci bck bcr bcy bi- bia bib bic bii bik bir biy bka bkb bkc bkk bkr bra brb bri brk brr bry by- bya byc byi byk byr c-- caa cab cac cai cak car cay cba cbb cbc cbi cbk cbr cby cca ccb ccc cci cck ccr ci- cia cib cic cii cik cir cka ckb ckc cki cky cra crb crc cri crk crr cry cya cyb cyc cyk cyr ia- iaa iab iac iai iar iba ibb ibc ibi ibk ibr iby ica icb icc ici ick icr icy iia iib iic iii iir ika ikb ikc iki ikk ikr ir- ira irb irc iri irk irr iry iya iyc iyr iyy ka- kaa kab kac kai kak kar kay kba kbb kbc kbi kbk kbr kca kcb kcc kci kck kcr kia kib kic kii kik kir kkb kkc kki kkk kkr kky kra krc kri krk krr kry kya kyc kyr ra- raa rab rac rai rak rar ray rba rbb rbc rbi rbk rbr rca rcb rcc rci rcr ria rib ric rii rik rir riy rkb rkc rkk rky rra rrb rrc rri rrk rrr ry- rya ryc ryk ryr ryy yaa yab yac yai yak yar yay ybc ybi ybr yby yca ycc yci ycy yii yir yka yki ykk yra yrc yyb yyc yyy