-er -ic c-- ccc cce cci cck ccl ccr ccs ccu ce- cec cee cei cek cel cer ces ceu ci- cic cie cii cik cil cir cis ciu ckc cki cks cl- clc cle cli clk cll clr cls clu crc cre cri crk crl crr crs cru csc cse csi csk csl csr css csu cuc cue cui cuk cul cur cus cuu ec- ecc ece eci eck ecl ecr ecs ecu eec eee eek eel eer ees eic eie eii eik eil eir eis eiu ekc eke eki ekl ekr eks eku elc ele eli elk ell elr els elu erc ere eri erk erl err ers eru es- esc ese esi esk esl esr ess esu eu- euc eue eui eul eur eus icc ice ici ick icl icr ics icu ie- iec iee iei iek iel ier ies iic iie iii iil iir iis iiu ikc ike iki ikk ikl ikr iks iku il- ilc ile ili ilk ill ilr ils ilu ir- irc ire iri irk irl irr irs iru is- isc ise isi isk isl isr iss isu iu- iuc iue iui iur ius kcc kce kci kck kcl kcr kcs kcu ke- kec kee kei kek kel ker kes kic kie kii kik kil kir kis kiu kkc kke kki kkk kkl kkr kks kku kl- klc kli klr kls klu krc kri krk krl krr krs kru ksc kse ksi ksk ksl ksr kss ksu kuc kue kui kuk kul kur kus kuu lcc lce lci lck lcl lcr lcs lcu lec lee lei lek lel ler les leu lic lie lii lik lil lir lis liu lkl lkr lks llc lle lli llk lll llr lls llu lrc lri lrk lrr lrs lru lsc lse lsi lsk lsl lsr lss lsu luc lue lui luk lul lur lus luu rcc rce rci rcl rcr rcs rcu re- rec ree rei rek rel rer res reu ric rie rii rik ril rir ris rkc rke rkk rks rku rlc rle rli rll rlr rls rlu rrc rri rrk rrl rrr rrs rru rsc rse rsi rsk rsl rsr rss rsu ruc rue rui ruk rur rus ruu scc sce sci sck scl scr scs scu se- sec see sei sek sel ser ses seu sic sie sii sik sil sir sis siu sk- skc ske ski skk skl skr sks sku slc sle sli slk sll slr sls slu sr- src sre sri srk srl srr srs ss- ssc sse ssi ssk ssl ssr sss ssu suc sue sui suk sul sur sus suu ucc uce uci uck ucl ucr ucs ucu uec uee uei uel uer ues uic uie uii uil uir uis uiu ukc uke uki ukk ukl ukr uku ulc ule uli ulk ull ulr uls ulu ur- urc ure uri urk url urr urs uru usc use usi usk usl usr uss usu uuc uue uur uus uuu