-er -ic c-- ccc cce cci ccr ccs ccu ccv ccx ce- cec cee cei cer ces ceu cev cex ci- cic cie cii cir cis ciu civ cix crc cre cri crr crs cru crv crx csc cse csi csr css csu csv csx cuc cue cui cur cus cuu cuv cvc cve cvi cvr cvs cvu cvv cvx cxc cxi cxr cxs cxv cxx ec- ecc ece eci ecr ecs ecu ecv ecx eec eee eer ees eev eex eic eie eii eir eis eiu eiv eix erc ere eri err ers eru erv es- esc ese esi esr ess esu esv esx eu- euc eue eui eur eus euv eux evc eve evi evr evs evv ex- exc exe exi exr exs exu exx i-v icc ice ici icr ics icu icv ie- iec iee iei ier ies iev iex iic iie iii iir iis iiu iix ir- irc ire iri irr irs iru irv irx is- isc ise isi isr iss isu isv iu- iuc iue iui iur ius ivc ive ivi ivr ivs ivu ivv ivx ixc ixe ixi rcc rce rci rcr rcs rcu rcv rcx re- rec ree rei rer res reu rev rex ric rie rii rir ris riv rix rrc rri rrr rrs rru rsc rse rsi rsr rss rsu rsv rsx ruc rue rui rur rus ruu ruv rux rvc rve rvi rvr rvs rvu rvv rxr rxs scc sce sci scr scs scu scv scx se- sec see sei ser ses seu sev sex sic sie sii sir sis siu siv six sr- src sre sri srr srs srv srx ss- ssc sse ssi ssr sss ssu ssv ssx suc sue sui sur sus suu suv sux svc sve svi svr svs svu svv svx sxc sxi sxs sxu 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 urx usc use usi usr uss usu usv usx uuc uue uur uus uuu uvc uve uvs uvu uvv uxc uxr uxu v-e vcc vce vci vcr vcs vcu vcx vec vee vei ver ves veu vex vi- vic vie vii vir vis viu viv vix vrc vre vri vrr vrs vru vsc vse vsi vsr vss vsu vsv vue vur vus vuv vvc vvi vvr vvs vvv vxr vxs vxv xci xcr xcv xcx xee xer xes xeu xev xex xic xie xii xis xiu xiv xix xrc xrx xsc xsi xss xue xui xus xuv xvi xxi xxv xxx