-al -ol a-a a-c a-t aaa aac aak aal aao aar aat ac- aca acc ack acl aco acr act aka akc akk akl ako akr al- ala alc alk all alo alr alt aoa aoc aok aol aoo aor aot ar- ara arc ark arl aro arr art at- ata atc atl ato atr att c-- caa cac cak cal cao car cat cca ccc cck ccl cco ccr cct cka ckc cko ckt cl- cla clc clk cll clo clr clt co- coa coc cok col coo cor cot cra crc crk crl cro crr crt cta ctc ctk ctl cto ctr ctt k-t ka- kaa kac kak kal kao kar kat kca kcc kck kcl kcr kct kkc kkk kkl kkr kkt kl- kla klc klo klr klt koa koc kok kol koo kor kot kra krc krk krl kro krr krt kta ktc ktk ktl kto ktr ktt la- laa lac lak lal lao lar lat lca lcc lck lcl lco lcr lct lka lkl lkr lkt lla llc llk lll llo llr llt loa loc lok lol loo lor lot lra lrc lrk lro lrr lrt lta ltc ltk ltl lto ltr ltt oaa oac oak oal oao oar oat oc- oca occ ock ocl oco ocr oct oka okc okk okl oko okr ola olc olk oll olo olt oo- ooa ooc ook ool ooo oor oot or- ora orc ork orl oro orr ort ot- ota otc otk otl oto otr ott ra- raa rac rak ral rao rar rat rca rcc rcl rco rcr rct rkc rkk rko rkt rla rlc rll rlo rlr rlt roa roc rok rol roo ror rot rra rrc rrk rrl rrr rrt rta rtc rtk rtl rto rtr rtt taa tac tak tal tao tar tat tca tcc tck tcl tco tcr tct tka tkc tkk tkl tko tkr tkt tla tlc tlk tll tlo tlr tlt to- toa toc tok tol too tor tot tra trc trk trl tro trr trt tta ttc ttk ttl tto ttr ttt