-al -ol a-a a-b a-t a-z aaa aab aaf aal aao aat aaz ab- aba abb abf abl abo abt abz af- afa afb aff afl afo aft afz al- ala alb alf all alo alt alz aoa aob aof aol aoo aot at- ata atb atf atl ato att atz az- aza azb azf azo azt azz baa bab baf bal bao bat baz bba bbb bbf bbl bbo bbt bfa bfb bff bfl bfo bft bfz bla blb blf bll blo blt blz boa bob bof bol boo bot boz bta btb btf btl bto btt btz bza bzf bzo bzz faa fab faf fal fao fat faz fba fbb fbf fbl fbo fbt ffa fff ffl ffo fft ffz fla flb flf fll flo flt foa fob fof fol foo fot foz fta ftb ftf ftl fto ftt ftz la- laa lab laf lal lao lat laz lba lbb lbf lbl lbo lbt lfa lfb lff lfl lfo lft lla llb llf lll llo llt llz loa lob lof lol loo lot loz lta ltb ltf ltl lto ltt ltz lzo oaa oab oaf oal oao oat ob- oba obb obf obl obo obt of- ofa ofb off ofl ofo oft ofz ola olb olf oll olo olt oo- ooa oob oof ool ooo oot ot- ota otb otf otl oto ott otz oza ozo ozt ozz taa tab taf tal tao tat taz tba tbb tbf tbl tbo tbt tbz tfa tfb tff tfl tfo tft tla tlf tll tlo tlt tlz to- toa tob tof tol too tot toz tta ttb ttf ttl tto ttt tza tzf zaa zab zaf zao zat zaz zbb zbl zbt zfa zla zlt zo- zoa zob zof zol zoo zot zta ztl zzt zzz