-ic a-a a-b a-c a-i a-t aaa aab aac aae aai aam aao aat ab- aba abb abc abe abi abm abo abt ac- aca acb acc ace aci acm aco act aea aeb aec aee aei aem aeo aet ai- aia aib aic aie aii aim aio ait ama amb amc ame ami amm amo amt aoa aob aoc aoe aoi aom aoo aot at- ata atb atc ate ati atm ato att baa bab bac bae bai bam bao bat bba bbb bbc bbe bbi bbm bbo bbt bca bcb bcc bce bci bcm bco bct be- bea beb bec bee bei bem beo bet bi- bia bib bic bie bii bim bio bit bma bmb bmc bme bmi bmm bmo bmt boa bob boc boe boi bom boo bot bta btb btc bte bti btm bto btt c-- caa cab cac cae cai cam cao cat cba cbb cbc cbe cbi cbm cbo cbt cca ccb ccc cce cci ccm cco cct ce- cea ceb cec cee cei cem ceo cet ci- cia cib cic cie cii cim cio cit cma cmb cmc cme cmi cmm cmo cmt co- coa cob coc coe coi com coo cot cta ctb ctc cte cti ctm cto ctt eaa eab eac eae eai eam eao eat eba ebb ebc ebe ebi ebm ebo ebt ec- eca ecb ecc ece eci ecm eco ect eea eeb eec eee eem eeo eet eia eib eic eie eii eim eio eit em- ema emb emc eme emi emm emo emt eo- eoa eob eoc eoe eoi eom eoo eot eta etb etc ete eti etm eto ett ia- iaa iab iac iae iai iam iao iat iba ibb ibc ibe ibi ibm ibo ibt ica icb icc ice ici icm ico ict ie- iea iec iee iei iem iet iia iib iic iie iii iim iio iit im- ima imb imc ime imi imm imo imt io- ioa iob ioc ioe ioi iom ioo iot ita itb itc ite iti itm ito itt m-o maa mab mac mae mai mam mao mat mba mbb mbc mbe mbi mbm mbo mbt mc- mca mcb mcc mce mci mcm mco mct mea meb mec mee mei mem meo met mi- mia mib mic mie mii mim mio mit mma mmb mmc mme mmi mmm mmo mmt moa mob moc moe moi mom moo mot mta mtb mtc mte mti mtm mto mtt o-i oaa oab oac oae oai oam oao oat ob- oba obb obc obe obi obm obo obt oc- oca ocb occ oci ocm oco oct oea oeb oec oee oei oem oeo oet oia oib oic oie oii oim oio oit om- oma omb omc ome omi omm omo omt oo- ooa oob ooc ooi oom ooo oot ot- ota otb otc ote oti otm oto ott taa tab tac tae tai tam tao tat tba tbb tbc tbe tbi tbm tbo tbt tca tcb tcc tce tci tcm tco tct te- tea teb tec tee tei tem teo tet tia tib tic tie tii tim tio tit tma tmb tmc tme tmi tmm tmo tmt to- toa tob toc toe toi tom too tot tta ttb ttc tte tti ttm tto ttt