a-a a-b a-t a-z aaa aab aak aao aat aau aaz ab- aba abb abk abo abt abu abz aka akb akk ako aku aoa aob aok aoo aot aou at- ata atb ato att atu atz au- aua aub auk auo aut auz az- aza azb azo azt azu azz b-u baa bab bak bao bat bau baz bba bbb bbk bbo bbt bbu bka bkb bkk bko bkt boa bob bok boo bot bou boz bta btb btk bto btt btu btz bua bub buk buo but buu buz bza bzo bzu bzz k-t k-z ka- kaa kab kak kao kat kau kaz kba kbb kbk kbo kbu kbz kkb kkk kkt kku koa kob kok koo kot kou koz kta ktb ktk kto ktt ktu kub kuk kut kuu kzo oaa oab oak oao oat oau ob- oba obb obk obo obt obu oka okb okk oko oku oo- ooa oob ook ooo oot ot- ota otb otk oto ott otu otz ou- oua ouk ouo out oza ozo ozt ozu ozz taa tab tak tao tat tau taz tba tbb tbk tbo tbt tbu tbz tka tkb tkk tko tkt tkz to- toa tob tok too tot tou toz tta ttb ttk tto ttt ttu tua tub tuk tuo tut tuu tuz tza tzu ua- uaa uab uak uao uat uau uaz uba ubb ubk ubo ubt ubu uka ukb ukk uku ukz uoa uob uok uoo uot uta utb utk uto utt utu utz uua uut uuu uza uzb uzo uzu zaa zab zak zao zat zaz zbb zbt zka zo- zoa zob zok zoo zot zou zta zub zuk zut zuz zzt zzz