-er -up c-- ccc ccd cce cck ccp ccr ccs ccu ccx cdc cdd cde cdk cdp cdr cds cdu cdx ce- cec ced cee cek cep cer ces ceu cex ckc ckd cks ckx cpc cpd cpe cpk cpp cpr cps cpu cpx crc crd cre crk crp crr crs cru crx csc csd cse csk csp csr css csu csx cuc cud cue cuk cup cur cus cuu cxc cxk cxp cxr cxs cxx dcc dcd dce dck dcp dcr dcs dcu dcx ddc ddd dde ddk ddp ddr dds ddu ddx de- dec ded dee dek dep der des deu dex dkc dke dkk dkp dkr dks dku dkx dpc dpd dpe dpk dpp dpr dps dpu drc drd dre drk drp drr drs dru drx dsc dsd dse dsk dsp dsr dss dsu dsx duc dud due duk dup dur dus dux dxc dxd dxp dxr dxs dxx ec- ecc ecd ece eck ecr ecs ecu ecx ed- edc edd ede edk edp edr eds edu edx eec eed eee eek eep eer ees eex ekc ekd eke ekp ekr eks eku ep- epc epd epe epp epr eps epu epx erc erd ere erk erp err ers eru es- esc esd ese esk esp esr ess esu esx eu- euc eud eue eup eur eus eux ex- exc exd exe exp exr exs exu exx kcc kcd kce kck kcp kcr kcs kcu kcx kdc kde kdk kdp kdr kds kdu kdx ke- kec ked kee kek kep ker kes kex kkc kke kkk kkp kkr kks kku kpc kpd kpe kpk kpp kpr kps kpu krc krd krk krp krr krs kru ksc ksd kse ksk ksp ksr kss ksu kuc kud kue kuk kup kur kus kuu p-p pcc pcd pce pck pcp pcr pcs pcu pcx pdc pdd pde pdk pdp pdr pds pdu pdx pec ped pee pek pep per pes peu pex pkc pkd pke pkp pkr pks pku ppc ppd ppe ppk ppp ppr pps ppu ppx prc prd pre prk prp prr prs pru prx ps- psc psd pse psk psp psr pss psu psx puc pud pue puk pup pur pus puu pxc pxe pxk pxr pxs rcc rcd rce rcp rcr rcs rcu rcx rdc rdd rde rdp rdr rds rdu rdx re- rec red ree rek rep rer res reu rex rkc rke rkk rkp rks rku rpc rpd rpe rpk rpp rpr rps rpu rpx rrc rrd rrk rrp rrr rrs rru rsc rsd rse rsk rsp rsr rss rsu rsx ruc rud rue ruk rup rur rus ruu rux rxp rxr rxs scc scd sce sck scp scr scs scu scx sdc sdd sde sdk sdp sdr sds sdu se- sec sed see sek sep ser ses seu sex sk- skc skd ske skk skp skr sks sku skx spc spd spe spk spp spr sps spu spx sr- src srd sre srk srp srr srs srx ss- ssc ssd sse ssk ssp ssr sss ssu ssx suc sud sue suk sup sur sus suu sux sxc sxs sxu ucc ucd uce uck ucp ucr ucs ucu udc udd ude udk udp udr uds udu udx uec ued uee uep uer ues ukc uke ukk ukp ukr uku up- upc upd upe upk upp upr ups upu upx ur- urc urd ure urk urp urr urs uru urx usc usd use usk usp usr uss usu usx uuc uue uur uus uuu uxc uxr uxu xcd xcp xcr xcx xdc xde xdk xdr xds xed xee xep xer xes xeu xex xke xks xpc xpd xpe xpp xps xrc xrd xrx xsc xsp xss xue xup xus xxp xxx