-er -up c-- ccc ccd cce ccn ccp ccr ccu cdc cdd cde cdn cdp cdr cdu ce- cec ced cee cen cep cer ceu cn- cnc cnd cne cnn cnp cnr cnu cpc cpd cpe cpn cpp cpr cpu crc crd cre crn crp crr cru cuc cud cue cun cup cur cuu dcc dcd dce dcn dcp dcr dcu ddc ddd dde ddn ddp ddr ddu de- dec ded dee den dep der deu dnc dnd dne dnn dnp dnr dpc dpd dpe dpn dpp dpr dpu drc drd dre drn drp drr dru duc dud due dun dup dur ec- ecc ecd ece ecn ecr ecu ed- edc edd ede edn edp edr edu eec eed eee een eep eer en- enc end ene enn enp enr enu ep- epc epd epe epn epp epr epu erc erd ere ern erp err eru eu- euc eud eue eun eup eur ncc ncd nce ncn ncp ncr ncu ndc ndd nde ndn ndp ndr ndu ne- nec ned nee nen nep ner neu nnc nne nnn nnp nnu npc npd npe npn npp npr npu nrc nrd nre nrn nrp nrr nru nuc nud nue nun nup nur nuu p-p pcc pcd pce pcn pcp pcr pcu pdc pdd pde pdn pdp pdr pdu pec ped pee pen pep per peu pn- pnc pnd pne pnn pnp pnr pnu ppc ppd ppe ppn ppp ppr ppu prc prd pre prn prp prr pru puc pud pue pun pup pur puu rcc rcd rce rcn rcp rcr rcu rdc rdd rde rdn rdp rdr rdu re- rec red ree ren rep rer reu rnc rnd rnn rnp rnr rnu rpc rpd rpe rpn rpp rpr rpu rrc rrd rrn rrp rrr rru ruc rud rue run rup rur ruu ucc ucd uce ucn ucp ucr ucu udc udd ude udn udp udr udu uec ued uee uen uep uer un- unc und une unn unp unr unu up- upc upd upe upn upp upr upu ur- urc urd ure urn urp urr uru uuc uue uun uur uuu