-ic a-a a-b a-c a-i aaa aab aac aai aam ab- aba abb abc abi abm ac- aca acb acc aci acm ai- aia aib aic aii aim ama amb amc ami amm baa bab bac bai bam bba bbb bbc bbi bbm bca bcb bcc bci bcm bi- bia bib bic bii bim bma bmb bmc bmi bmm c-- caa cab cac cai cam cba cbb cbc cbi cbm cca ccb ccc cci ccm ci- cia cib cic cii cim cma cmb cmc cmi cmm ia- iaa iab iac iai iam iba ibb ibc ibi ibm ica icb icc ici icm iia iib iic iii iim im- ima imb imc imi imm maa mab mac mai mam mba mbb mbc mbi mbm mc- mca mcb mcc mci mcm mi- mia mib mic mii mim mma mmb mmc mmi mmm