-er -ic c-- ccc cce cci cck ccr ccs cct ccu ce- cec cee cei cek cer ces cet ceu ci- cic cie cii cik cir cis cit ciu ckc cki cks ckt crc cre cri crk crr crs crt cru csc cse csi csk csr css cst csu ctc cte cti ctk ctr cts ctt ctu cuc cue cui cuk cur cus cut cuu ec- ecc ece eci eck ecr ecs ect ecu eec eee eek eer ees eet eic eie eii eik eir eis eit eiu ekc eke eki ekr eks ekt eku erc ere eri erk err ers ert eru es- esc ese esi esk esr ess est esu etc ete eti etk etr ets ett etu eu- euc eue eui eur eus eut icc ice ici ick icr ics ict icu ie- iec iee iei iek ier ies iet iic iie iii iir iis iit iiu ikc ike iki ikk ikr iks ikt iku ir- irc ire iri irk irr irs irt iru is- isc ise isi isk isr iss ist isu itc ite iti itk its itt itu iu- iuc iue iui iur ius iut k-t kcc kce kci kck kcr kcs kct kcu ke- kec kee kei kek ker kes ket kic kie kii kik kir kis kit kiu kkc kke kki kkk kkr kks kkt kku krc kri krk krr krs krt kru ksc kse ksi ksk ksr kss kst ksu ktc kte ktk ktr kts ktt ktu kuc kue kui kuk kur kus kut kuu rcc rce rci rcr rcs rct rcu re- rec ree rei rek rer res ret reu ric rie rii rik rir ris rit rkc rke rkk rks rkt rku rrc rri rrk rrr rrs rrt rru rsc rse rsi rsk rsr rss rst rsu rtc rte rti rtk rtr rts rtt rtu ruc rue rui ruk rur rus rut ruu scc sce sci sck scr scs sct scu se- sec see sei sek ser ses set seu sic sie sii sik sir sis sit siu sk- skc ske ski skk skr sks skt sku sr- src sre sri srk srr srs srt ss- ssc sse ssi ssk ssr sss sst ssu stc ste sti stk str sts stt stu suc sue sui suk sur sus sut suu tcc tce tci tck tcr tcs tct tcu te- tec tee tei tek ter tes tet teu tic tie tii tik tir tis tit tiu tkc tke tkk tkr tks tkt trc tre tri trk trr trs trt tru tsc tse tsi tsk tsr tss tst tsu ttc tte tti ttk ttr tts ttt ttu tuc tue tui tuk tur tus tut tuu ucc uce uci uck ucr ucs uct ucu uec uee uei uer ues uet uic uie uii uir uis uit uiu ukc uke uki ukk ukr uku ur- urc ure uri urk urr urs urt uru usc use usi usk usr uss ust usu utc ute uti utk utr uts utt utu uuc uue uur uus uut uuu