-er -ol c-- ccc ccd cce cck ccl cco ccp ccr cdc cdd cde cdk cdl cdo cdp cdr ce- cec ced cee cek cel ceo cep cer ckc ckd cko cl- clc cld cle clk cll clo clp clr co- coc cod coe cok col coo cop cor cpc cpd cpe cpk cpl cpo cpp cpr crc crd cre crk crl cro crp crr dcc dcd dce dck dcl dco dcp dcr ddc ddd dde ddk ddl ddo ddp ddr de- dec ded dee dek del deo dep der dkc dke dkk dkl dko dkp dkr dl- dlc dld dle dlk dll dlo dlp dlr doc dod doe dok dol doo dop dor dpc dpd dpe dpk dpl dpo dpp dpr drc drd dre drk drl dro drp drr ec- ecc ecd ece eck ecl eco ecr ed- edc edd ede edk edl edo edp edr eec eed eee eek eel eeo eep eer ekc ekd eke ekl eko ekp ekr elc eld ele elk ell elo elp elr eo- eoc eod eoe eok eol eoo eop eor ep- epc epd epe epl epo epp epr erc erd ere erk erl ero erp err kcc kcd kce kck kcl kcp kcr kdc kde kdk kdl kdo kdp kdr ke- kec ked kee kek kel keo kep ker kkc kke kkk kkl kkp kkr kl- klc kld klo klr koc kod koe kok kol koo kop kor kpc kpd kpe kpk kpl kpo kpp kpr krc krd krk krl kro krp krr l-p lcc lcd lce lck lcl lco lcp lcr ldc ldd lde ldk ldl ldo ldp ldr lec led lee lek lel leo lep ler lkl lkp lkr llc lld lle llk lll llo llp llr loc lod loe lok lol loo lop lor lpc lpd lpe lpk lpl lpo lpp lpr lrc lrd lrk lro lrp lrr oc- occ ocd ock ocl oco ocp ocr odc odd ode odl odo odp odr oec oed oee oel oeo oep oer okc okd oke okk okl oko okp okr olc old ole olk oll olo olp oo- ooc ood ook ool ooo oop oor op- opc opd ope opk opl opo opp opr or- orc ord ore ork orl oro orp orr p-p pcc pcd pce pck pcl pco pcp pcr pdc pdd pde pdk pdl pdo pdp pdr pec ped pee pek pel peo pep per pkc pkd pke pkl pko pkp pkr plc pld ple plk pll plo plp plr poc pod poe pok pol poo pop por ppc ppd ppe ppk ppl ppo ppp ppr prc prd pre prk prl pro prp prr rcc rcd rce rcl rco rcp rcr rdc rdd rde rdl rdo rdp rdr re- rec red ree rek rel reo rep rer rkc rke rkk rko rkp rlc rld rle rll rlo rlp rlr roc rod roe rok rol roo rop ror rpc rpd rpe rpk rpl rpo rpp rpr rrc rrd rrk rrl rrp rrr