-ic a-a a-b a-c a-i aaa aab aac aag aai aak aar aay ab- aba abb abc abg abi abk abr aby ac- aca acb acc acg aci ack acr acy ag- aga agb agc agg agi agk agr agy ai- aia aib aic aig aii aik air aiy aka akb akc akg aki akk akr ar- ara arb arc arg ari ark arr ary ay- aya ayc ayi ayk ayr baa bab bac bag bai bak bar bay bba bbb bbc bbg bbi bbk bbr bby bca bcb bcc bcg bci bck bcr bcy bga bgb bgc bgg bgi bgk bgr bi- bia bib bic big bii bik bir biy bka bkb bkc bkg bkk bkr bra brb brg bri brk brr bry by- bya byc byg byi byk byr c-- caa cab cac cag cai cak car cay cba cbb cbc cbg cbi cbk cbr cby cca ccb ccc ccg cci cck ccr cga cgb cgc cgg cgi cgr cgy ci- cia cib cic cig cii cik cir cka ckb ckc cki cky cra crb crc crg cri crk crr cry cya cyb cyc cyg cyk cyr gaa gab gac gag gai gak gar gay gba gbc gbg gbi gbk gbr gby gca gcb gcc gcg gci gck gcr gga ggb ggc ggg ggi ggr gia gib gic gig gii gik gir giy gka gkb gra grb grc grg gri grk grr gry gy- gya gyb gyr ia- iaa iab iac iag iai iar iba ibb ibc ibg ibi ibk ibr iby ica icb icc icg ici ick icr icy iga igb igc igg igi igk igr igy iia iib iic iii iir ika ikb ikc iki ikk ikr ir- ira irb irc irg iri irk irr iry iya iyc iyr iyy ka- kaa kab kac kag kai kak kar kay kba kbb kbc kbi kbk kbr kca kcb kcc kcg kci kck kcr kga kgb kgc kgi kgy kia kib kic kig kii kik kir kkb kkc kki kkk kkr kky kra krc krg kri krk krr kry kya kyc kyr ra- raa rab rac rag rai rak rar ray rba rbb rbc rbg rbi rbk rbr rca rcb rcc rcg rci rcr rga rgb rgc rgg rgi rgk rgr ria rib ric rig rii rik rir riy rkb rkc rkg rkk rky rra rrb rrc rrg rri rrk rrr ry- rya ryc ryg ryk ryr ryy yaa yab yac yag yai yak yar yay ybc ybg ybi ybr yby yca ycc yci ycy yga ygc yig yii yir yka yki ykk yra yrc yrg yyb yyc yyg yyy