-ic a-a a-b a-c a-i aaa aab aac aai aam aas aay ab- aba abb abc abi abm abs aby ac- aca acb acc aci acm acs acy ai- aia aib aic aii aim ais aiy ama amb amc ami amm ams amy as- asa asb asc asi asm ass asy ay- aya ayc ayi ays baa bab bac bai bam bas bay bba bbb bbc bbi bbm bbs bby bca bcb bcc bci bcm bcs bcy bi- bia bib bic bii bim bis biy bma bmb bmc bmi bmm bms bsa bsb bsc bsi bsm bss bsy by- bya byc byi bym bys c-- caa cab cac cai cam cas cay cba cbb cbc cbi cbm cbs cby cca ccb ccc cci ccm ccs ci- cia cib cic cii cim cis cma cmb cmc cmi cmm cms cmy csa csb csc csi csm css csy cya cyb cyc cym cys ia- iaa iab iac iai iam ias iba ibb ibc ibi ibm ibs iby ica icb icc ici icm ics icy iia iib iic iii iim iis im- ima imb imc imi imm ims imy is- isa isb isc isi ism iss isy iya iyc iym iys iyy maa mab mac mai mam mas may mba mbb mbc mbi mbm mbs mc- mca mcb mcc mci mcm mcs mi- mia mib mic mii mim mis miy mma mmb mmc mmi mmm mms msa msb msc msi msm mss msy my- mya myb myc mym mys saa sab sac sai sam sas say sba sbb sbc sbi sbm sbs sby sca scb scc sci scm scs sia sib sic sii sim sis sma smb smc smi smm sms smy ss- ssa ssb ssc ssi ssm sss sy- sya syb syc syi sym sys yaa yab yac yai yam yas yay ybc ybi ybm ybs yby yca ycc yci ycs ycy yii yim yis yma ymc ymi ymm yms ysa ysb ysc ysi ysm yss ysy yyb yyc yys yyy