-er -ey -ic c-- ccc ccd cce ccf cci cco ccr ccx cdc cdd cde cdf cdi cdo cdr cdx cdy ce- cec ced cee cef cei ceo cer cex cey cfc cfd cfe cff cfi cfo cfr cfx ci- cic cid cie cif cii cio cir cix co- coc cod coe cof coi coo cor cox coy crc crd cre crf cri cro crr crx cry cxc cxf cxi cxo cxr cxx cyc cyd cye cyf cyo cyr dcc dcd dce dcf dci dco dcr dcx ddc ddd dde ddf ddi ddo ddr ddx ddy de- dec ded dee def dei deo der dex dey dfc dfd dfe dff dfi dfo dfr dfx di- dic did die dif dii dio dir dix diy doc dod doe dof doi doo dor dox doy drc drd dre dri dro drr drx dry dxc dxd dxi dxo dxr dxx dy- dyc dyd dye dyo dyr dyy ec- ecc ecd ece ecf eci eco ecr ecx ed- edc edd ede edf edi edo edr edx edy eec eed eee eef eeo eer eex eey ef- efc efd efe eff efi efo efr efx eic eid eie eif eii eio eir eix eo- eoc eod eoe eof eoi eoo eor erc erd ere erf eri ero err ery ex- exc exd exe exi exo exr exx exy eyc eyd eye eyo eyr fcc fcd fce fcf fci fco fcr fcx fcy fdc fdd fde fdf fdi fdo fdr fdx fec fed fee fef fei feo fer fex fey ffc ffd ffe fff ffi ffo ffr ffx ffy fic fid fie fif fii fir fix foc foe fof foi foo for fox foy frc frd fre frf fri fro frr fry fxe fxi fxr fxx fy- fyc fye fyi fyo i-d i-f icc icd ice icf ici ico icr icy idc idd ide idf idi ido idr idx idy ie- iec ied iee ief iei ier iex iey ifc ifd ife iff ifi ifo ifr ifx ify iic iid iie iif iii iio iir iix io- ioc iod ioe iof ioi ioo ior ir- irc ird ire irf iri iro irr irx iry ixc ixe ixi ixy iyc iye iyo iyr iyy o-i oc- occ ocd ocf oci oco ocr ocx odc odd ode odf odi odo odr oec oed oee oef oei oeo oer oex oey of- ofc ofd ofe off ofi ofo ofr ofx oic oid oie oif oii oio oir oo- ooc ood oof ooi ooo oor oox or- orc ord ore orf ori oro orr orx ory ox- oxc oxf oxi oxo oxx oxy oyd oye oyi oyo rcc rcd rce rcf rci rco rcr rcx rdc rdd rde rdf rdi rdo rdr rdx rdy re- rec red ree ref rei reo rer rex rey rfc rfd rfe rff rfi rfo rfr ric rid rie rif rii rio rir rix riy roc rod roe rof roi roo ror rox roy rrc rrd rrf rri rrr rxr ry- ryc ryd rye ryf ryo ryr ryy xcd xcf xci xcr xcx xdc xde xdf xdi xdr xed xee xer xex xfe xfx xic xie xii xio xix xoc xod xof xoi xoo xor xox xrc xrd xrf xrx xry xxi xxo xxx xxy xyr xyy ycc ycd yce ycf yci yco ycy yde ydo ydy yec yed yee yef yei yeo yer yex yey yfc yfd yfe yff yfr yid yie yif yii yio yir yoc yod yoe yof yoi yoo yor yox yoy yrc yre yrf yro yxe yxy yyc yye yyf yyy