-ic a-a a-b a-c a-i a-t aaa aab aac aai aam aao aat ab- aba abb abc abi abm abo abt ac- aca acb acc aci acm aco act ai- aia aib aic aii aim aio ait ama amb amc ami amm amo amt aoa aob aoc aoi aom aoo aot at- ata atb atc ati atm ato att baa bab bac bai bam bao bat bba bbb bbc bbi bbm bbo bbt bca bcb bcc bci bcm bco bct bi- bia bib bic bii bim bio bit bma bmb bmc bmi bmm bmo bmt boa bob boc boi bom boo bot bta btb btc bti btm bto btt c-- caa cab cac cai cam cao cat cba cbb cbc cbi cbm cbo cbt cca ccb ccc cci ccm cco cct ci- cia cib cic cii cim cio cit cma cmb cmc cmi cmm cmo cmt co- coa cob coc coi com coo cot cta ctb ctc cti ctm cto ctt ia- iaa iab iac iai iam iao iat iba ibb ibc ibi ibm ibo ibt ica icb icc ici icm ico ict iia iib iic iii iim iio iit im- ima imb imc imi imm imo imt io- ioa iob ioc ioi iom ioo iot ita itb itc iti itm ito itt m-o maa mab mac mai mam mao mat mba mbb mbc mbi mbm mbo mbt mc- mca mcb mcc mci mcm mco mct mi- mia mib mic mii mim mio mit mma mmb mmc mmi mmm mmo mmt moa mob moc moi mom moo mot mta mtb mtc mti mtm mto mtt o-i oaa oab oac oai oam oao oat ob- oba obb obc obi obm obo obt oc- oca ocb occ oci ocm oco oct oia oib oic oii oim oio oit om- oma omb omc omi omm omo omt oo- ooa oob ooc ooi oom ooo oot ot- ota otb otc oti otm oto ott taa tab tac tai tam tao tat tba tbb tbc tbi tbm tbo tbt tca tcb tcc tci tcm tco tct tia tib tic tii tim tio tit tma tmb tmc tmi tmm tmo tmt to- toa tob toc toi tom too tot tta ttb ttc tti ttm tto ttt