-er c-- ccc ccd cce ccn cco ccr ccu ccv cdc cdd cde cdn cdo cdr cdu cdv ce- cec ced cee cen ceo cer ceu cev cn- cnc cnd cne cnn cno cnr cnu cnv co- coc cod coe con coo cor cou cov crc crd cre crn cro crr cru crv cuc cud cue cun cuo cur cuu cuv cvc cvd cve cvn cvo cvr cvu cvv dcc dcd dce dcn dco dcr dcu dcv ddc ddd dde ddn ddo ddr ddu de- dec ded dee den deo der deu dev dnc dnd dne dnn dno dnr doc dod doe don doo dor dou dov drc drd dre drn dro drr dru drv duc dud due dun duo dur duv dvc dvd dve dvn dvr dvu ec- ecc ecd ece ecn eco ecr ecu ecv ed- edc edd ede edn edo edr edu eec eed eee een eeo eer eev en- enc end ene enn eno enr enu env eo- eoc eod eoe eon eoo eor eou erc erd ere ern ero err eru erv eu- euc eud eue eun eur euv evc evd eve evn evo evr evv ncc ncd nce ncn nco ncr ncu ncv ndc ndd nde ndn ndo ndr ndu ndv ne- nec ned nee nen neo ner neu nev nnc nne nnn nno nnu nnv no- noc nod noe non noo nor nou nov nrc nrd nre nrn nro nrr nru nrv nuc nud nue nun nuo nur nuu nuv nvc nvd nve nvn nvu nvv oc- occ ocd ocn oco ocr ocu ocv odc odd ode odn odo odr odu odv oec oed oee oen oeo oer on- onc ond one onn ono onr onu oo- ooc ood oon ooo oor oov or- orc ord ore orn oro orr oru orv ou- ouc oud oue oun ouo our ov- ovc ovd ove ovo ovv rcc rcd rce rcn rco rcr rcu rcv rdc rdd rde rdn rdo rdr rdu rdv re- rec red ree ren reo rer reu rev rnc rnd rnn rno rnr rnu rnv roc rod roe ron roo ror rou rov rrc rrd rrn rrr rru ruc rud rue run ruo rur ruu ruv rvc rvd rve rvn rvo rvr rvu rvv ucc ucd uce ucn uco ucr ucu ucv udc udd ude udn udo udr udu udv uec ued uee uen uer un- unc und une unn uno unr unu unv uoc uod uoe uon uoo uor ur- urc urd ure urn uro urr uru uuc uue uun uur uuu uvc uve uvo uvu uvv v-e vcc vcd vce vcn vco vcr vcu vdc vdd vde vdo vdr vdu vdv vec ved vee ven veo ver veu vn- vnd vno vnr vnu vnv voc vod voe von voo vor vou vov vrc vrd vre vrn vrr vru vue vur vuv vvc vvo vvr vvv