-ic a-a a-b a-c a-i aaa aab aac aai aam aan aao ab- aba abb abc abi abm abn abo ac- aca acb acc aci acm acn aco ai- aia aib aic aii aim ain aio ama amb amc ami amm amn amo an- ana anb anc ani anm ann ano aoa aob aoc aoi aom aon aoo baa bab bac bai bam ban bao bba bbb bbc bbi bbm bbn bbo bca bcb bcc bci bcm bcn bco bi- bia bib bic bii bim bin bio bma bmb bmc bmi bmm bmn bmo bna bnb bnc bni bnn bno boa bob boc boi bom bon boo c-- caa cab cac cai cam can cao cba cbb cbc cbi cbm cbn cbo cca ccb ccc cci ccm ccn cco ci- cia cib cic cii cim cin cio cma cmb cmc cmi cmm cmn cmo cn- cna cnb cnc cni cnm cnn cno co- coa cob coc coi com con coo ia- iaa iab iac iai iam ian iao iba ibb ibc ibi ibm ibn ibo ica icb icc ici icm icn ico iia iib iic iii iim iin iio im- ima imb imc imi imm imn imo in- ina inb inc ini inm inn ino io- ioa iob ioc ioi iom ion ioo m-o maa mab mac mai mam man mao mba mbb mbc mbi mbm mbo mc- mca mcb mcc mci mcm mcn mco mi- mia mib mic mii mim min mio mma mmb mmc mmi mmm mmn mmo mna mnb mnc mni mnm mnn mno moa mob moc moi mom mon moo n-i naa nab nac nai nam nan nao nba nbb nbc nbi nbm nbn nbo nca ncb ncc nci ncm ncn nco nia nib nic nii nim nin nio nma nmb nmc nmi nmm nmn nmo nna nnb nnc nni nnm nnn nno no- noa nob noc noi nom non noo o-i oaa oab oac oai oam oan oao ob- oba obb obc obi obm obn obo oc- oca ocb occ oci ocm ocn oco oia oib oic oii oim oin oio om- oma omb omc omi omm omn omo on- ona onb onc oni onn ono oo- ooa oob ooc ooi oom oon ooo