-er c-- ccc ccd cce cco ccr cct ccu ccv cdc cdd cde cdo cdr cdt cdu cdv ce- cec ced cee ceo cer cet ceu cev co- coc cod coe coo cor cot cou cov crc crd cre cro crr crt cru crv ctc ctd cte cto ctr ctt ctu ctv cuc cud cue cuo cur cut cuu cuv cvc cvd cve cvo cvr cvt cvu cvv dcc dcd dce dco dcr dct dcu dcv ddc ddd dde ddo ddr ddt ddu de- dec ded dee deo der det deu dev doc dod doe doo dor dot dou dov drc drd dre dro drr drt dru drv dtc dtd dte dto dtr dtt dtu dtv duc dud due duo dur dut duv dvc dvd dve dvr dvt dvu ec- ecc ecd ece eco ecr ect ecu ecv ed- edc edd ede edo edr edt edu eec eed eee eeo eer eet eev eo- eoc eod eoe eoo eor eot eou erc erd ere ero err ert eru erv etc etd ete eto etr ett etu etv eu- euc eud eue eur eut euv evc evd eve evo evr evt evv oc- occ ocd oco ocr oct ocu ocv odc odd ode odo odr odt odu odv oec oed oee oeo oer oet oo- ooc ood ooo oor oot oov or- orc ord ore oro orr ort oru orv ot- otc otd ote oto otr ott otu otv ou- ouc oud oue ouo our out ov- ovc ovd ove ovo ovv rcc rcd rce rco rcr rct rcu rcv rdc rdd rde rdo rdr rdt rdu rdv re- rec red ree reo rer ret reu rev roc rod roe roo ror rot rou rov rrc rrd rrr rrt rru rtc rtd rte rto rtr rtt rtu rtv ruc rud rue ruo rur rut ruu ruv rvc rvd rve rvo rvr rvt rvu rvv tcc tcd tce tco tcr tct tcu tcv tdc tdd tde tdo tdr tdt tdu tdv te- tec ted tee teo ter tet teu tev to- toc tod toe too tor tot tou tov trc trd tre tro trr trt tru trv ttc ttd tte tto ttr ttt ttu ttv tuc tud tue tuo tur tut tuu tuv tvc tvd tve tvo tvr tvt tvu ucc ucd uce uco ucr uct ucu ucv udc udd ude udo udr udt udu udv uec ued uee uer uet uoc uod uoe uoo uor uot ur- urc urd ure uro urr urt uru utc utd ute uto utr utt utu utv uuc uue uur uut uuu uvc uve uvo uvu uvv v-e vcc vcd vce vco vcr vct vcu vdc vdd vde vdo vdr vdt vdu vdv vec ved vee veo ver vet veu voc vod voe voo vor vot vou vov vrc vrd vre vrr vrt vru vtc vte vto vtr vtt vtu vtv vue vur vut vuv vvc vvo vvr vvt vvv