a-a a-b a-i a-t aaa aab aae aai aak aam aao aat ab- aba abb abe abi abk abm abo abt aea aeb aee aei aek aem aeo aet ai- aia aib aie aii aik aim aio ait aka akb ake aki akk akm ako ama amb ame ami amk amm amo amt aoa aob aoe aoi aok aom aoo aot at- ata atb ate ati atm ato att baa bab bae bai bak bam bao bat bba bbb bbe bbi bbk bbm bbo bbt be- bea beb bee bei bek bem beo bet bi- bia bib bie bii bik bim bio bit bka bkb bke bkk bkm bko bkt bma bmb bme bmi bmk bmm bmo bmt boa bob boe boi bok bom boo bot bta btb bte bti btk btm bto btt eaa eab eae eai eak eam eao eat eba ebb ebe ebi ebk ebm ebo ebt eea eeb eee eek eem eeo eet eia eib eie eii eik eim eio eit eka ekb eke eki eko ekt em- ema emb eme emi emk emm emo emt eo- eoa eob eoe eoi eok eom eoo eot eta etb ete eti etk etm eto ett ia- iaa iab iae iai iam iao iat iba ibb ibe ibi ibk ibm ibo ibt ie- iea iee iei iek iem iet iia iib iie iii iim iio iit ika ikb ike iki ikk iko ikt im- ima imb ime imi imm imo imt io- ioa iob ioe ioi iom ioo iot ita itb ite iti itk itm ito itt k-t ka- kaa kab kae kai kak kam kao kat kba kbb kbe kbi kbk kbm kbo ke- kea keb kee kei kek kem keo ket kia kib kie kii kik kim kio kit kkb kke kki kkk kkm kkt kma kmb kme kmi kmk kmm kmo kmt koa kob koe koi kok kom koo kot kta ktb kte ktk ktm kto ktt m-o maa mab mae mai mak mam mao mat mba mbb mbe mbi mbk mbm mbo mbt mea meb mee mei mek mem meo met mi- mia mib mie mii mik mim mio mit mka mkb mke mkk mkm mko mkt mma mmb mme mmi mmk mmm mmo mmt moa mob moe moi mok mom moo mot mta mtb mte mti mtk mtm mto mtt o-i oaa oab oae oai oak oam oao oat ob- oba obb obe obi obk obm obo obt oea oeb oee oei oem oeo oet oia oib oie oii oik oim oio oit oka okb oke oki okk oko om- oma omb ome omi omm omo omt oo- ooa oob ooi ook oom ooo oot ot- ota otb ote oti otk otm oto ott taa tab tae tai tak tam tao tat tba tbb tbe tbi tbk tbm tbo tbt te- tea teb tee tei tek tem teo tet tia tib tie tii tik tim tio tit tka tkb tke tkk tkm tko tkt tma tmb tme tmi tmk tmm tmo tmt to- toa tob toe toi tok tom too tot tta ttb tte tti ttk ttm tto ttt