-er -ic c-- ccc cce cci ccr ccs ccu ccv ce- cec cee cei cer ces ceu cev ci- cic cie cii cir cis ciu civ crc cre cri crr crs cru crv csc cse csi csr css csu csv cuc cue cui cur cus cuu cuv cvc cve cvi cvr cvs cvu cvv ec- ecc ece eci ecr ecs ecu ecv eec eee eer ees eev eic eie eii eir eis eiu eiv erc ere eri err ers eru erv es- esc ese esi esr ess esu esv eu- euc eue eui eur eus euv evc eve evi evr evs evv i-v icc ice ici icr ics icu icv ie- iec iee iei ier ies iev iic iie iii iir iis iiu ir- irc ire iri irr irs iru irv is- isc ise isi isr iss isu isv iu- iuc iue iui iur ius ivc ive ivi ivr ivs ivu ivv rcc rce rci rcr rcs rcu rcv re- rec ree rei rer res reu rev ric rie rii rir ris riv rrc rri rrr rrs rru rsc rse rsi rsr rss rsu rsv ruc rue rui rur rus ruu ruv rvc rve rvi rvr rvs rvu rvv scc sce sci scr scs scu scv se- sec see sei ser ses seu sev sic sie sii sir sis siu siv sr- src sre sri srr srs srv ss- ssc sse ssi ssr sss ssu ssv suc sue sui sur sus suu suv svc sve svi svr svs svu svv ucc uce uci ucr ucs ucu ucv uec uee uei uer ues uic uie uii uir uis uiu ur- urc ure uri urr urs uru usc use usi usr uss usu usv uuc uue uur uus uuu uvc uve uvs uvu uvv v-e vcc vce vci vcr vcs vcu vec vee vei ver ves veu vi- vic vie vii vir vis viu viv vrc vre vri vrr vrs vru vsc vse vsi vsr vss vsu vsv vue vur vus vuv vvc vvi vvr vvs vvv