-er c-- ccc ccd cce ccf cck cco ccr ccu ccv cdc cdd cde cdf cdk cdo cdr cdu cdv ce- cec ced cee cef cek ceo cer ceu cev cfc cfd cfe cff cfk cfo cfr cfu cfv ckc ckd cko co- coc cod coe cof cok coo cor cou cov crc crd cre crf crk cro crr cru crv cuc cud cue cuf cuk cuo cur cuu cuv cvc cvd cve cvf cvk cvo cvr cvu cvv dcc dcd dce dcf dck dco dcr dcu dcv ddc ddd dde ddf ddk ddo ddr ddu de- dec ded dee def dek deo der deu dev dfc dfd dfe dff dfk dfo dfr dfu dfv dkc dke dkk dko dkr dku doc dod doe dof dok doo dor dou dov drc drd dre drk dro drr dru drv duc dud due duf duk duo dur duv dvc dvd dve dvk dvr dvu ec- ecc ecd ece ecf eck eco ecr ecu ecv ed- edc edd ede edf edk edo edr edu eec eed eee eef eek eeo eer eev ef- efc efd efe eff efo efr ekc ekd eke ekf eko ekr eku ekv eo- eoc eod eoe eof eok eoo eor eou erc erd ere erf erk ero err eru erv eu- euc eud eue euf eur euv evc evd eve evf evo evr evv fcc fcd fce fcf fck fco fcr fcu fcv fdc fdd fde fdf fdk fdo fdr fdu fec fed fee fef fek feo fer feu fev ffc ffd ffe fff ffk ffo ffr ffu ffv fkc fkf fkk foc foe fof fok foo for fou frc frd fre frf frk fro frr fru fud fue fuf fuk fuo fur fuu fuv fvc fvd fvk kcc kcd kce kck kcr kcu kdc kde kdf kdk kdo kdr kdu ke- kec ked kee kef kek keo ker kev kfc kfd kff kfo kfu kkc kke kkk kkr kku kkv koc kod koe kof kok koo kor kou krc krd krf krk kro krr kru krv kuc kud kue kuk kur kuu kvk kvo kvr kvv oc- occ ocd ocf ock oco ocr ocu ocv odc odd ode odf odo odr odu odv oec oed oee oef oeo oer of- ofc ofd ofe off ofo ofr ofu ofv okc okd oke okk oko okr oku oo- ooc ood oof ook ooo oor oov or- orc ord ore orf ork oro orr oru orv ou- ouc oud oue ouf ouk ouo our ov- ovc ovd ove ovf ovo ovv rcc rcd rce rcf rco rcr rcu rcv rdc rdd rde rdf rdo rdr rdu rdv re- rec red ree ref rek reo rer reu rev rfc rfd rfe rff rfk rfo rfr rfu rfv rkc rke rkf rkk rko rku rkv roc rod roe rof rok roo ror rou rov rrc rrd rrf rrk rrr rru ruc rud rue ruf ruk ruo rur ruu ruv rvc rvd rve rvf rvo rvr rvu rvv ucc ucd uce ucf uck uco ucr ucu ucv udc udd ude udf udk udo udr udu udv uec ued uee uef uer ufc ufd ufe uff ufo ufr ufu ufv ukc uke ukf ukk ukr uku uoc uod uoe uok uoo uor ur- urc urd ure urf urk uro urr uru uuc uue uur uuu uvc uve uvf uvo uvu uvv v-e vcc vcd vce vcf vco vcr vcu vdc vdd vde vdf vdk vdo vdr vdu vdv vec ved vee vef vek veo ver veu vfc vfd vff vfr vfu vfv voc vod voe vof vok voo vor vou vov vrc vrd vre vrf vrk vrr vru vue vuk vur vuv vvc vvo vvr vvv