a-a a-b a-i a-t aaa aab aai aam aao aat ab- aba abb abi abm abo abt ai- aia aib aii aim aio ait ama amb ami amm amo amt aoa aob aoi aom aoo aot at- ata atb ati atm ato att baa bab bai bam bao bat bba bbb bbi bbm bbo bbt bi- bia bib bii bim bio bit bma bmb bmi bmm bmo bmt boa bob boi bom boo bot bta btb bti btm bto btt ia- iaa iab iai iam iao iat iba ibb ibi ibm ibo ibt iia iib iii iim iio iit im- ima imb imi imm imo imt io- ioa iob ioi iom ioo iot ita itb iti itm ito itt m-o maa mab mai mam mao mat mba mbb mbi mbm mbo mbt mi- mia mib mii mim mio mit mma mmb mmi mmm mmo mmt moa mob moi mom moo mot mta mtb mti mtm mto mtt o-i oaa oab oai oam oao oat ob- oba obb obi obm obo obt oia oib oii oim oio oit om- oma omb omi omm omo omt oo- ooa oob ooi oom ooo oot ot- ota otb oti otm oto ott taa tab tai tam tao tat tba tbb tbi tbm tbo tbt tia tib tii tim tio tit tma tmb tmi tmm tmo tmt to- toa tob toi tom too tot tta ttb tti ttm tto ttt