-ic a-a a-b a-c a-i aaa aab aac aai aak aar aas aay ab- aba abb abc abi abk abr abs aby ac- aca acb acc aci ack acr acs acy ai- aia aib aic aii aik air ais aiy aka akb akc aki akk akr aks ar- ara arb arc ari ark arr ars ary as- asa asb asc asi ask asr ass asy ay- aya ayc ayi ayk ayr ays baa bab bac bai bak bar bas bay bba bbb bbc bbi bbk bbr bbs bby bca bcb bcc bci bck bcr bcs bcy bi- bia bib bic bii bik bir bis biy bka bkb bkc bkk bkr bks bra brb bri brk brr brs bry bsa bsb bsc bsi bsk bsr bss bsy by- bya byc byi byk byr bys c-- caa cab cac cai cak car cas cay cba cbb cbc cbi cbk cbr cbs cby cca ccb ccc cci cck ccr ccs ci- cia cib cic cii cik cir cis cka ckb ckc cki cks cky cra crb crc cri crk crr crs cry csa csb csc csi csk csr css csy cya cyb cyc cyk cyr cys ia- iaa iab iac iai iar ias iba ibb ibc ibi ibk ibr ibs iby ica icb icc ici ick icr ics icy iia iib iic iii iir iis ika ikb ikc iki ikk ikr iks ir- ira irb irc iri irk irr irs iry is- isa isb isc isi isk isr iss isy iya iyc iyr iys iyy ka- kaa kab kac kai kak kar kas kay kba kbb kbc kbi kbk kbr kbs kca kcb kcc kci kck kcr kcs kia kib kic kii kik kir kis kkb kkc kki kkk kkr kks kky kra krc kri krk krr krs kry ksa ksb ksc ksi ksk ksr kss kya kyc kyr kys ra- raa rab rac rai rak rar ras ray rba rbb rbc rbi rbk rbr rbs rca rcb rcc rci rcr rcs ria rib ric rii rik rir ris riy rkb rkc rkk rks rky rra rrb rrc rri rrk rrr rrs rsa rsb rsc rsi rsk rsr rss ry- rya ryc ryk ryr rys ryy saa sab sac sai sak sar sas say sba sbb sbc sbi sbk sbr sbs sby sca scb scc sci sck scr scs sia sib sic sii sik sir sis sk- ska skb skc ski skk skr sks sky sr- sra srb src sri srk srr srs sry ss- ssa ssb ssc ssi ssk ssr sss sy- sya syb syc syi syk syr sys yaa yab yac yai yak yar yas yay ybc ybi ybr ybs yby yca ycc yci ycs ycy yii yir yis yka yki ykk yra yrc yrs ysa ysb ysc ysi ysk ysr yss ysy yyb yyc yys yyy