-ic a-a a-b a-c a-i aaa aab aac aai aam aan ab- aba abb abc abi abm abn ac- aca acb acc aci acm acn ai- aia aib aic aii aim ain ama amb amc ami amm amn an- ana anb anc ani anm ann baa bab bac bai bam ban bba bbb bbc bbi bbm bbn bca bcb bcc bci bcm bcn bi- bia bib bic bii bim bin bma bmb bmc bmi bmm bmn bna bnb bnc bni bnn c-- caa cab cac cai cam can cba cbb cbc cbi cbm cbn cca ccb ccc cci ccm ccn ci- cia cib cic cii cim cin cma cmb cmc cmi cmm cmn cn- cna cnb cnc cni cnm cnn ia- iaa iab iac iai iam ian iba ibb ibc ibi ibm ibn ica icb icc ici icm icn iia iib iic iii iim iin im- ima imb imc imi imm imn in- ina inb inc ini inm inn maa mab mac mai mam man mba mbb mbc mbi mbm mc- mca mcb mcc mci mcm mcn mi- mia mib mic mii mim min mma mmb mmc mmi mmm mmn mna mnb mnc mni mnm mnn n-i naa nab nac nai nam nan nba nbb nbc nbi nbm nbn nca ncb ncc nci ncm ncn nia nib nic nii nim nin nma nmb nmc nmi nmm nmn nna nnb nnc nni nnm nnn