a-a a-b a-t a-z aaa aab aae aam aao aat aaz ab- aba abb abe abm abo abt abz aea aeb aee aem aeo aet aez ama amb ame amm amo amt amz aoa aob aoe aom aoo aot at- ata atb ate atm ato att atz az- aza azb aze azm azo azt azz baa bab bae bam bao bat baz bba bbb bbe bbm bbo bbt be- bea beb bee bem beo bet bez bma bmb bme bmm bmo bmt bmz boa bob boe bom boo bot boz bta btb bte btm bto btt btz bza bze bzo bzz eaa eab eae eam eao eat eaz eba ebb ebe ebm ebo ebt eea eeb eee eem eeo eet em- ema emb eme emm emo emt eo- eoa eob eoe eom eoo eot eta etb ete etm eto ett etz eze ezo ezz m-o maa mab mae mam mao mat maz mba mbb mbe mbm mbo mbt mea meb mee mem meo met mez mma mmb mme mmm mmo mmt mmz moa mob moe mom moo mot moz mta mtb mte mtm mto mtt mza mzb mzm mzt oaa oab oae oam oao oat ob- oba obb obe obm obo obt oea oeb oee oem oeo oet om- oma omb ome omm omo omt omz oo- ooa oob oom ooo oot ot- ota otb ote otm oto ott otz oza oze ozm ozo ozt ozz taa tab tae tam tao tat taz tba tbb tbe tbm tbo tbt tbz te- tea teb tee tem teo tet tez tma tmb tme tmm tmo tmt tmz to- toa tob toe tom too tot toz tta ttb tte ttm tto ttt tza tze zaa zab zam zao zat zaz zbb zbm zbt zea zeb zee zem zeo zet zez zma zmb zmm zmt zo- zoa zob zoe zom zoo zot zta zte ztm zzt zzz