a-a a-b a-t aaa aab aae aam aan aao aat ab- aba abb abe abm abn abo abt aea aeb aee aem aen aeo aet ama amb ame amm amn amo amt an- ana anb ane anm ann ano ant aoa aob aoe aom aon aoo aot at- ata atb ate atm atn ato att baa bab bae bam ban bao bat bba bbb bbe bbm bbn bbo bbt be- bea beb bee bem ben beo bet bma bmb bme bmm bmn bmo bmt bna bnb bne bnn bno bnt boa bob boe bom bon boo bot bta btb bte btm btn bto btt eaa eab eae eam ean eao eat eba ebb ebe ebm ebn ebo ebt eea eeb eee eem een eeo eet em- ema emb eme emm emn emo emt en- ena enb ene enm enn eno ent eo- eoa eob eoe eom eon eoo eot eta etb ete etm etn eto ett m-o maa mab mae mam man mao mat mba mbb mbe mbm mbo mbt mea meb mee mem men meo met mma mmb mme mmm mmn mmo mmt mna mnb mne mnm mnn mno mnt moa mob moe mom mon moo mot mta mtb mte mtm mtn mto mtt naa nab nae nam nan nao nat nba nbb nbe nbm nbn nbo nbt ne- nea neb nee nem nen neo net nma nmb nme nmm nmn nmo nmt nna nnb nne nnm nnn nno nnt no- noa nob noe nom non noo not nta ntb nte ntm ntn nto ntt oaa oab oae oam oan oao oat ob- oba obb obe obm obn obo obt oea oeb oee oem oen oeo oet om- oma omb ome omm omn omo omt on- ona onb one onn ono ont oo- ooa oob oom oon ooo oot ot- ota otb ote otm otn oto ott taa tab tae tam tan tao tat tba tbb tbe tbm tbn tbo tbt te- tea teb tee tem ten teo tet tma tmb tme tmm tmn tmo tmt tna tnb tne tnm tnn tno tnt to- toa tob toe tom ton too tot tta ttb tte ttm ttn tto ttt