-al -ol a-a a-b a-t aaa aab aak aal aao aat ab- aba abb abk abl abo abt aka akb akk akl ako al- ala alb alk all alo alt aoa aob aok aol aoo aot at- ata atb atl ato att baa bab bak bal bao bat bba bbb bbk bbl bbo bbt bka bkb bkk bkl bko bkt bla blb blk bll blo blt boa bob bok bol boo bot bta btb btk btl bto btt k-t ka- kaa kab kak kal kao kat kba kbb kbk kbl kbo kkb kkk kkl kkt kl- kla klb klo klt koa kob kok kol koo kot kta ktb ktk ktl kto ktt la- laa lab lak lal lao lat lba lbb lbk lbl lbo lbt lka lkb lkl lkt lla llb llk lll llo llt loa lob lok lol loo lot lta ltb ltk ltl lto ltt oaa oab oak oal oao oat ob- oba obb obk obl obo obt oka okb okk okl oko ola olb olk oll olo olt oo- ooa oob ook ool ooo oot ot- ota otb otk otl oto ott taa tab tak tal tao tat tba tbb tbk tbl tbo tbt tka tkb tkk tkl tko tkt tla tlk tll tlo tlt to- toa tob tok tol too tot tta ttb ttk ttl tto ttt