-ol c-- ccc cck ccl ccn cco ccs cct ckc cko cks ckt cl- clc clk cll cln clo cls clt cn- cnc cnl cnn cno cns cnt co- coc cok col con coo cos cot csc csk csl csn cso css cst ctc ctk ctl ctn cto cts ctt k-t kcc kck kcl kcn kcs kct kkc kkk kkl kkn kks kkt kl- klc klo kls klt kn- knc knk knl knn kno knt koc kok kol kon koo kos kot ksc ksk ksl ksn kso kss kst ktc ktk ktl ktn kto kts ktt lcc lck lcl lcn lco lcs lct lkl lks lkt llc llk lll lln llo lls llt lnc lnk lnl lnn lno lns lnt loc lok lol lon loo los lot lsc lsk lsl lsn lso lss lst ltc ltk ltl lto lts ltt ncc nck ncl ncn nco ncs nct nkc nkk nkn nko nks nkt nlc nlk nll nln nlo nls nlt nnc nnk nnl nnn nno nns nnt no- noc nok nol non noo nos not nsc nsk nsl nsn nso nss nst ntc ntk ntn nto nts ntt oc- occ ock ocl ocn oco ocs oct okc okk okl oko oks olc olk oll oln olo ols olt on- onc onk onl onn ono ons ont oo- ooc ook ool oon ooo oos oot os- osc osk osl osn oso oss ost ot- otc otk otl otn oto ots ott scc sck scl scn sco scs sct sk- skc skk skl sko sks skt slc slk sll sln slo sls slt snc snk snl snn sno sns snt soc sok sol son soo sos sot ss- ssc ssk ssl ssn sso sss sst stc stk stl stn sto sts stt tcc tck tcl tcn tco tcs tct tkc tkk tkl tko tks tkt tlc tlk tll tln tlo tls tlt tnc tnk tnl tnn tno tns tnt to- toc tok tol ton too tos tot tsc tsk tsl tsn tso tss tst ttc ttk ttl ttn tto tts ttt