-er -ic c-- ccc ccd cce cci ccr ccs ccu ccv cdc cdd cde cdi cdr cds cdu cdv ce- cec ced cee cei cer ces ceu cev ci- cic cid cie cii cir cis ciu civ crc crd cre cri crr crs cru crv csc csd cse csi csr css csu csv cuc cud cue cui cur cus cuu cuv cvc cvd cve cvi cvr cvs cvu cvv dcc dcd dce dci dcr dcs dcu dcv ddc ddd dde ddi ddr dds ddu de- dec ded dee dei der des deu dev di- dic did die dii dir dis diu div drc drd dre dri drr drs dru drv dsc dsd dse dsi dsr dss dsu dsv duc dud due dui dur dus duv dvc dvd dve dvi dvr dvs dvu ec- ecc ecd ece eci ecr ecs ecu ecv ed- edc edd ede edi edr eds edu eec eed eee eer ees eev eic eid eie eii eir eis eiu eiv erc erd ere eri err ers eru erv es- esc esd ese esi esr ess esu esv eu- euc eud eue eui eur eus euv evc evd eve evi evr evs evv i-d i-v icc icd ice ici icr ics icu icv idc idd ide idi idr ids idu idv ie- iec ied iee iei ier ies iev iic iid iie iii iir iis iiu ir- irc ird ire iri irr irs iru irv is- isc isd ise isi isr iss isu isv iu- iuc iud iue iui iur ius ivc ivd ive ivi ivr ivs ivu ivv rcc rcd rce rci rcr rcs rcu rcv rdc rdd rde rdi rdr rds rdu rdv re- rec red ree rei rer res reu rev ric rid rie rii rir ris riv rrc rrd rri rrr rrs rru rsc rsd rse rsi rsr rss rsu rsv ruc rud rue rui rur rus ruu ruv rvc rvd rve rvi rvr rvs rvu rvv scc scd sce sci scr scs scu scv sdc sdd sde sdi sdr sds sdu sdv se- sec sed see sei ser ses seu sev sic sid sie sii sir sis siu siv sr- src srd sre sri srr srs srv ss- ssc ssd sse ssi ssr sss ssu ssv suc sud sue sui sur sus suu suv svc svd sve svi svr svs svu svv ucc ucd uce uci ucr ucs ucu ucv udc udd ude udi udr uds udu udv uec ued uee uei uer ues uic uid uie uii uir uis uiu ur- urc urd ure uri urr urs uru usc usd use usi usr uss usu usv uuc uue uur uus uuu uvc uve uvs uvu uvv v-e vcc vcd vce vci vcr vcs vcu vdc vdd vde vdi vdr vds vdu vdv vec ved vee vei ver ves veu vi- vic vid vie vii vir vis viu viv vrc vrd vre vri vrr vrs vru vsc vsd vse vsi vsr vss vsu vsv vue vur vus vuv vvc vvi vvr vvs vvv