-ic a-a a-b a-c a-i a-t aaa aab aac aai aam aao aat aay ab- aba abb abc abi abm abo abt aby ac- aca acb acc aci acm aco act acy ai- aia aib aic aii aim aio ait aiy ama amb amc ami amm amo amt amy aoa aob aoc aoi aom aoo aot at- ata atb atc ati atm ato att ay- aya ayc ayi ayo ayt baa bab bac bai bam bao bat bay bba bbb bbc bbi bbm bbo bbt bby bca bcb bcc bci bcm bco bct bcy bi- bia bib bic bii bim bio bit biy bma bmb bmc bmi bmm bmo bmt boa bob boc boi bom boo bot boy bta btb btc bti btm bto btt bty by- bya byc byi bym byo byt c-- caa cab cac cai cam cao cat cay cba cbb cbc cbi cbm cbo cbt cby cca ccb ccc cci ccm cco cct ci- cia cib cic cii cim cio cit cma cmb cmc cmi cmm cmo cmt cmy co- coa cob coc coi com coo cot coy cta ctb ctc cti ctm cto ctt cty cya cyb cyc cym cyo cyt ia- iaa iab iac iai iam iao iat iba ibb ibc ibi ibm ibo ibt iby ica icb icc ici icm ico ict icy iia iib iic iii iim iio iit im- ima imb imc imi imm imo imt imy io- ioa iob ioc ioi iom ioo iot ita itb itc iti itm ito itt ity iya iyc iym iyo iyt iyy m-o maa mab mac mai mam mao mat may mba mbb mbc mbi mbm mbo mbt mc- mca mcb mcc mci mcm mco mct mi- mia mib mic mii mim mio mit miy mma mmb mmc mmi mmm mmo mmt moa mob moc moi mom moo mot moy mta mtb mtc mti mtm mto mtt my- mya myb myc mym myo myt o-i oaa oab oac oai oam oao oat ob- oba obb obc obi obm obo obt oby oc- oca ocb occ oci ocm oco oct oia oib oic oii oim oio oit om- oma omb omc omi omm omo omt omy oo- ooa oob ooc ooi oom ooo oot ot- ota otb otc oti otm oto ott oya oyi oyo taa tab tac tai tam tao tat tay tba tbb tbc tbi tbm tbo tbt tca tcb tcc tci tcm tco tct tia tib tic tii tim tio tit tiy tma tmb tmc tmi tmm tmo tmt tmy to- toa tob toc toi tom too tot toy tta ttb ttc tti ttm tto ttt tty tya tyc tym tyo tyt yaa yab yac yai yam yao yat yay ybc ybi ybm yby yca ycc yci yco ycy yii yim yio yit yma ymc ymi ymm ymo ymt yob yoc yoi yom yoo yot yoy yta ytc ytm yto ytt yyb yyc yyt yyy