-al -ol a-a a-b a-c a-t aaa aab aac aak aal aao aat ab- aba abb abc abk abl abo abt ac- aca acb acc ack acl aco act aka akb akc akk akl ako al- ala alb alc alk all alo alt aoa aob aoc aok aol aoo aot at- ata atb atc atl ato att baa bab bac bak bal bao bat bba bbb bbc bbk bbl bbo bbt bca bcb bcc bck bcl bco bct bka bkb bkc bkk bkl bko bkt bla blb blc blk bll blo blt boa bob boc bok bol boo bot bta btb btc btk btl bto btt c-- caa cab cac cak cal cao cat cba cbb cbc cbk cbl cbo cbt cca ccb ccc cck ccl cco cct cka ckb ckc cko ckt cl- cla clb clc clk cll clo clt co- coa cob coc cok col coo cot cta ctb ctc ctk ctl cto ctt k-t ka- kaa kab kac kak kal kao kat kba kbb kbc kbk kbl kbo kca kcb kcc kck kcl kct kkb kkc kkk kkl kkt kl- kla klb klc klo klt koa kob koc kok kol koo kot kta ktb ktc ktk ktl kto ktt la- laa lab lac lak lal lao lat lba lbb lbc lbk lbl lbo lbt lca lcb lcc lck lcl lco lct lka lkb lkl lkt lla llb llc llk lll llo llt loa lob loc lok lol loo lot lta ltb ltc ltk ltl lto ltt oaa oab oac oak oal oao oat ob- oba obb obc obk obl obo obt oc- oca ocb occ ock ocl oco oct oka okb okc okk okl oko ola olb olc olk oll olo olt oo- ooa oob ooc ook ool ooo oot ot- ota otb otc otk otl oto ott taa tab tac tak tal tao tat tba tbb tbc tbk tbl tbo tbt tca tcb tcc tck tcl tco tct tka tkb tkc tkk tkl tko tkt tla tlc tlk tll tlo tlt to- toa tob toc tok tol too tot tta ttb ttc ttk ttl tto ttt