-er c-- ccc ccd cce cco ccr ccs ccu ccv cdc cdd cde cdo cdr cds cdu cdv ce- cec ced cee ceo cer ces ceu cev co- coc cod coe coo cor cos cou cov crc crd cre cro crr crs cru crv csc csd cse cso csr css csu csv cuc cud cue cuo cur cus cuu cuv cvc cvd cve cvo cvr cvs cvu cvv dcc dcd dce dco dcr dcs dcu dcv ddc ddd dde ddo ddr dds ddu de- dec ded dee deo der des deu dev doc dod doe doo dor dos dou dov drc drd dre dro drr drs dru drv dsc dsd dse dso dsr dss dsu dsv duc dud due duo dur dus duv dvc dvd dve dvr dvs dvu ec- ecc ecd ece eco ecr ecs ecu ecv ed- edc edd ede edo edr eds edu eec eed eee eeo eer ees eev eo- eoc eod eoe eoo eor eos eou erc erd ere ero err ers eru erv es- esc esd ese eso esr ess esu esv eu- euc eud eue eur eus euv evc evd eve evo evr evs evv oc- occ ocd oco ocr ocs ocu ocv odc odd ode odo odr ods odu odv oec oed oee oeo oer oes oo- ooc ood ooo oor oos oov or- orc ord ore oro orr ors oru orv os- osc osd ose oso osr oss osu osv ou- ouc oud oue ouo our ous ov- ovc ovd ove ovo ovs ovv rcc rcd rce rco rcr rcs rcu rcv rdc rdd rde rdo rdr rds rdu rdv re- rec red ree reo rer res reu rev roc rod roe roo ror ros rou rov rrc rrd rrr rrs rru rsc rsd rse rso rsr rss rsu rsv ruc rud rue ruo rur rus ruu ruv rvc rvd rve rvo rvr rvs rvu rvv scc scd sce sco scr scs scu scv sdc sdd sde sdo sdr sds sdu sdv se- sec sed see seo ser ses seu sev soc sod soe soo sor sos sou sov sr- src srd sre sro srr srs srv ss- ssc ssd sse sso ssr sss ssu ssv suc sud sue suo sur sus suu suv svc svd sve svo svr svs svu svv ucc ucd uce uco ucr ucs ucu ucv udc udd ude udo udr uds udu udv uec ued uee uer ues uoc uod uoe uoo uor uos ur- urc urd ure uro urr urs uru usc usd use uso usr uss usu usv uuc uue uur uus uuu uvc uve uvo uvs uvu uvv v-e vcc vcd vce vco vcr vcs vcu vdc vdd vde vdo vdr vds vdu vdv vec ved vee veo ver ves veu voc vod voe voo vor vos vou vov vrc vrd vre vrr vrs vru vsc vsd vse vso vsr vss vsu vsv vue vur vus vuv vvc vvo vvr vvs vvv