-er -ic c-- ccc cce cci cck ccl ccr ccs cct ce- cec cee cei cek cel cer ces cet ci- cic cie cii cik cil cir cis cit ckc cki cks ckt cl- clc cle cli clk cll clr cls clt crc cre cri crk crl crr crs crt csc cse csi csk csl csr css cst ctc cte cti ctk ctl ctr cts ctt ec- ecc ece eci eck ecl ecr ecs ect eec eee eek eel eer ees eet eic eie eii eik eil eir eis eit ekc eke eki ekl ekr eks ekt elc ele eli elk ell elr els elt erc ere eri erk erl err ers ert es- esc ese esi esk esl esr ess est etc ete eti etk etl etr ets ett icc ice ici ick icl icr ics ict ie- iec iee iei iek iel ier ies iet iic iie iii iil iir iis iit ikc ike iki ikk ikl ikr iks ikt il- ilc ile ili ilk ill ilr ils ilt ir- irc ire iri irk irl irr irs irt is- isc ise isi isk isl isr iss ist itc ite iti itk itl its itt k-t kcc kce kci kck kcl kcr kcs kct ke- kec kee kei kek kel ker kes ket kic kie kii kik kil kir kis kit kkc kke kki kkk kkl kkr kks kkt kl- klc kli klr kls klt krc kri krk krl krr krs krt ksc kse ksi ksk ksl ksr kss kst ktc kte ktk ktl ktr kts ktt lcc lce lci lck lcl lcr lcs lct lec lee lei lek lel ler les let lic lie lii lik lil lir lis lit lkl lkr lks lkt llc lle lli llk lll llr lls llt lrc lri lrk lrr lrs lrt lsc lse lsi lsk lsl lsr lss lst ltc lte lti ltk ltl ltr lts ltt rcc rce rci rcl rcr rcs rct re- rec ree rei rek rel rer res ret ric rie rii rik ril rir ris rit rkc rke rkk rks rkt rlc rle rli rll rlr rls rlt rrc rri rrk rrl rrr rrs rrt rsc rse rsi rsk rsl rsr rss rst rtc rte rti rtk rtl rtr rts rtt scc sce sci sck scl scr scs sct se- sec see sei sek sel ser ses set sic sie sii sik sil sir sis sit sk- skc ske ski skk skl skr sks skt slc sle sli slk sll slr sls slt sr- src sre sri srk srl srr srs srt ss- ssc sse ssi ssk ssl ssr sss sst stc ste sti stk stl str sts stt tcc tce tci tck tcl tcr tcs tct te- tec tee tei tek tel ter tes tet tic tie tii tik til tir tis tit tkc tke tkk tkl tkr tks tkt tlc tle tli tlk tll tlr tls tlt trc tre tri trk trl trr trs trt tsc tse tsi tsk tsl tsr tss tst ttc tte tti ttk ttl ttr tts ttt