-ic a-a a-b a-c a-i aaa aab aac aai aak aam ab- aba abb abc abi abk abm ac- aca acb acc aci ack acm ai- aia aib aic aii aik aim aka akb akc aki akk akm ama amb amc ami amk amm baa bab bac bai bak bam bba bbb bbc bbi bbk bbm bca bcb bcc bci bck bcm bi- bia bib bic bii bik bim bka bkb bkc bkk bkm bma bmb bmc bmi bmk bmm c-- caa cab cac cai cak cam cba cbb cbc cbi cbk cbm cca ccb ccc cci cck ccm ci- cia cib cic cii cik cim cka ckb ckc cki ckm cma cmb cmc cmi cmk cmm ia- iaa iab iac iai iam iba ibb ibc ibi ibk ibm ica icb icc ici ick icm iia iib iic iii iim ika ikb ikc iki ikk im- ima imb imc imi imm ka- kaa kab kac kai kak kam kba kbb kbc kbi kbk kbm kca kcb kcc kci kck kcm kia kib kic kii kik kim kkb kkc kki kkk kkm kma kmb kmc kmi kmk kmm maa mab mac mai mak mam mba mbb mbc mbi mbk mbm mc- mca mcb mcc mci mck mcm mi- mia mib mic mii mik mim mka mkb mkc mkk mkm mma mmb mmc mmi mmk mmm