-er -ol c-- ccc ccd cce ccf ccl cco ccr cdc cdd cde cdf cdl cdo cdr ce- cec ced cee cef cel ceo cer cfc cfd cfe cff cfl cfo cfr cl- clc cld cle clf cll clo clr co- coc cod coe cof col coo cor crc crd cre crf crl cro crr dcc dcd dce dcf dcl dco dcr ddc ddd dde ddf ddl ddo ddr de- dec ded dee def del deo der dfc dfd dfe dff dfl dfo dfr dl- dlc dld dle dlf dll dlo dlr doc dod doe dof dol doo dor drc drd dre drl dro drr ec- ecc ecd ece ecf ecl eco ecr ed- edc edd ede edf edl edo edr eec eed eee eef eel eeo eer ef- efc efd efe eff efl efo efr elc eld ele elf ell elo elr eo- eoc eod eoe eof eol eoo eor erc erd ere erf erl ero err fcc fcd fce fcf fcl fco fcr fdc fdd fde fdf fdl fdo fdr fec fed fee fef fel feo fer ffc ffd ffe fff ffl ffo ffr flc fld fle flf fll flo flr foc foe fof fol foo for frc frd fre frf frl fro frr lcc lcd lce lcf lcl lco lcr ldc ldd lde ldf ldl ldo ldr lec led lee lef lel leo ler lfc lfd lfe lff lfl lfo lfr llc lld lle llf lll llo llr loc lod loe lof lol loo lor lrc lrd lrf lro lrr oc- occ ocd ocf ocl oco ocr odc odd ode odf odl odo odr oec oed oee oef oel oeo oer of- ofc ofd ofe off ofl ofo ofr olc old ole olf oll olo oo- ooc ood oof ool ooo oor or- orc ord ore orf orl oro orr rcc rcd rce rcf rcl rco rcr rdc rdd rde rdf rdl rdo rdr re- rec red ree ref rel reo rer rfc rfd rfe rff rfl rfo rfr rlc rld rle rlf rll rlo rlr roc rod roe rof rol roo ror rrc rrd rrf rrl rrr