-al -ol a-a a-c a-t aaa aac aak aal aan aao aar aat ac- aca acc ack acl acn aco acr act aka akc akk akl akn ako akr al- ala alc alk all aln alo alr alt an- ana anc ank anl ann ano anr ant aoa aoc aok aol aon aoo aor aot ar- ara arc ark arl arn aro arr art at- ata atc atl atn ato atr att c-- caa cac cak cal can cao car cat cca ccc cck ccl ccn cco ccr cct cka ckc cko ckt cl- cla clc clk cll cln clo clr clt cn- cna cnc cnl cnn cno cnr cnt co- coa coc cok col con coo cor cot cra crc crk crl crn cro crr crt cta ctc ctk ctl ctn cto ctr ctt k-t ka- kaa kac kak kal kan kao kar kat kca kcc kck kcl kcn kcr kct kkc kkk kkl kkn kkr kkt kl- kla klc klo klr klt kn- kna knc knk knl knn kno knr knt koa koc kok kol kon koo kor kot kra krc krk krl krn kro krr krt kta ktc ktk ktl ktn kto ktr ktt la- laa lac lak lal lan lao lar lat lca lcc lck lcl lcn lco lcr lct lka lkl lkr lkt lla llc llk lll lln llo llr llt lna lnc lnk lnl lnn lno lnr lnt loa loc lok lol lon loo lor lot lra lrc lrk lrn lro lrr lrt lta ltc ltk ltl lto ltr ltt naa nac nak nal nan nao nar nat nca ncc nck ncl ncn nco ncr nct nka nkc nkk nkn nko nkr nkt nla nlc nlk nll nln nlo nlr nlt nna nnc nnk nnl nnn nno nnt no- noa noc nok nol non noo nor not nra nrc nrk nrl nrn nro nrr nrt nta ntc ntk ntn nto ntr ntt oaa oac oak oal oan oao oar oat oc- oca occ ock ocl ocn oco ocr oct oka okc okk okl oko okr ola olc olk oll oln olo olt on- ona onc onk onl onn ono onr ont oo- ooa ooc ook ool oon ooo oor oot or- ora orc ork orl orn oro orr ort ot- ota otc otk otl otn oto otr ott ra- raa rac rak ral ran rao rar rat rca rcc rcl rcn rco rcr rct rkc rkk rko rkt rla rlc rll rln rlo rlr rlt rna rnc rnn rno rnr rnt roa roc rok rol ron roo ror rot rra rrc rrk rrl rrn rrr rrt rta rtc rtk rtl rtn rto rtr rtt taa tac tak tal tan tao tar tat tca tcc tck tcl tcn tco tcr tct tka tkc tkk tkl tko tkr tkt tla tlc tlk tll tln tlo tlr tlt tna tnc tnk tnl tnn tno tnr tnt to- toa toc tok tol ton too tor tot tra trc trk trl trn tro trr trt tta ttc ttk ttl ttn tto ttr ttt