-er -ic c-- ccc ccd cce ccf cci ccl ccr ccs ccx cdc cdd cde cdf cdi cdl cdr cds cdx ce- cec ced cee cef cei cel cer ces cex cfc cfd cfe cff cfi cfl cfr cfs cfx ci- cic cid cie cif cii cil cir cis cix cl- clc cld cle clf cli cll clr cls clx crc crd cre crf cri crl crr crs crx csc csd cse csf csi csl csr css csx cxc cxf cxi cxl cxr cxs cxx dcc dcd dce dcf dci dcl dcr dcs dcx ddc ddd dde ddf ddi ddl ddr dds ddx de- dec ded dee def dei del der des dex dfc dfd dfe dff dfi dfl dfr dfs dfx di- dic did die dif dii dil dir dis dix dl- dlc dld dle dlf dli dll dlr dls dlx drc drd dre dri drl drr drs drx dsc dsd dse dsf dsi dsl dsr dss dsx dxc dxd dxi dxl dxr dxs dxx ec- ecc ecd ece ecf eci ecl ecr ecs ecx ed- edc edd ede edf edi edl edr eds edx eec eed eee eef eel eer ees eex ef- efc efd efe eff efi efl efr efs efx eic eid eie eif eii eil eir eis eix elc eld ele elf eli ell elr els elx erc erd ere erf eri erl err ers es- esc esd ese esf esi esl esr ess esx ex- exc exd exe exi exl exr exs exx fcc fcd fce fcf fci fcl fcr fcs fcx fdc fdd fde fdf fdi fdl fdr fds fdx fec fed fee fef fei fel fer fes fex ffc ffd ffe fff ffi ffl ffr ffs ffx fic fid fie fif fii fil fir fis fix flc fld fle flf fli fll flr fls flx frc frd fre frf fri frl frr frs fsc fsd fse fsf fsi fsl fsr fss fsx fxe fxi fxr fxs fxx i-d i-f icc icd ice icf ici icl icr ics idc idd ide idf idi idl idr ids idx ie- iec ied iee ief iei iel ier ies iex ifc ifd ife iff ifi ifl ifr ifs ifx iic iid iie iif iii iil iir iis iix il- ilc ild ile ilf ili ill ilr ils ilx ir- irc ird ire irf iri irl irr irs irx is- isc isd ise isf isi isl isr iss ixc ixe ixi ixl lcc lcd lce lcf lci lcl lcr lcs lcx ldc ldd lde ldf ldi ldl ldr lds lec led lee lef lei lel ler les lex lfc lfd lfe lff lfi lfl lfr lfs lfx lic lid lie lif lii lil lir lis lix llc lld lle llf lli lll llr lls lrc lrd lrf lri lrr lrs lsc lsd lse lsf lsi lsl lsr lss lxc lxd lxi lxr lxx rcc rcd rce rcf rci rcl rcr rcs rcx rdc rdd rde rdf rdi rdl rdr rds rdx re- rec red ree ref rei rel rer res rex rfc rfd rfe rff rfi rfl rfr rfs ric rid rie rif rii ril rir ris rix rlc rld rle rlf rli rll rlr rls rrc rrd rrf rri rrl rrr rrs rsc rsd rse rsf rsi rsl rsr rss rsx rxr rxs scc scd sce scf sci scl scr scs scx sdc sdd sde sdf sdi sdl sdr sds se- sec sed see sef sei sel ser ses sex sfc sfd sfe sff sfi sfl sfr sfs sfx sic sid sie sif sii sil sir sis six slc sld sle slf sli sll slr sls slx sr- src srd sre srf sri srl srr srs srx ss- ssc ssd sse ssf ssi ssl ssr sss ssx sxc sxi sxl sxs xcd xcf xci xcl xcr xcx xdc xde xdf xdi xdr xds xed xee xel xer xes xex xfe xfl xfs xfx xic xie xii xis xix xld xlf xli xlr xls xrc xrd xrf xrx xsc xsi xsl xss xxi xxl xxx