-al -ol a-a a-b a-t a-z aaa aab aal aao aat aaz ab- aba abb abl abo abt abz al- ala alb all alo alt alz aoa aob aol aoo aot at- ata atb atl ato att atz az- aza azb azo azt azz baa bab bal bao bat baz bba bbb bbl bbo bbt bla blb bll blo blt blz boa bob bol boo bot boz bta btb btl bto btt btz bza bzo bzz la- laa lab lal lao lat laz lba lbb lbl lbo lbt lla llb lll llo llt llz loa lob lol loo lot loz lta ltb ltl lto ltt ltz lzo oaa oab oal oao oat ob- oba obb obl obo obt ola olb oll olo olt oo- ooa oob ool ooo oot ot- ota otb otl oto ott otz oza ozo ozt ozz taa tab tal tao tat taz tba tbb tbl tbo tbt tbz tla tll tlo tlt tlz to- toa tob tol too tot toz tta ttb ttl tto ttt tza zaa zab zao zat zaz zbb zbl zbt zla zlt zo- zoa zob zol zoo zot zta ztl zzt zzz