-er -ic c-- ccc ccd cce ccf cci cck ccl ccr cdc cdd cde cdf cdi cdk cdl cdr ce- cec ced cee cef cei cek cel cer cfc cfd cfe cff cfi cfk cfl cfr ci- cic cid cie cif cii cik cil cir ckc ckd cki cl- clc cld cle clf cli clk cll clr crc crd cre crf cri crk crl crr dcc dcd dce dcf dci dck dcl dcr ddc ddd dde ddf ddi ddk ddl ddr de- dec ded dee def dei dek del der dfc dfd dfe dff dfi dfk dfl dfr di- dic did die dif dii dik dil dir dkc dke dki dkk dkl dkr dl- dlc dld dle dlf dli dlk dll dlr drc drd dre dri drk drl drr ec- ecc ecd ece ecf eci eck ecl ecr ed- edc edd ede edf edi edk edl edr eec eed eee eef eek eel eer ef- efc efd efe eff efi efl efr eic eid eie eif eii eik eil eir ekc ekd eke ekf eki ekl ekr elc eld ele elf eli elk ell elr erc erd ere erf eri erk erl err fcc fcd fce fcf fci fck fcl fcr fdc fdd fde fdf fdi fdk fdl fdr fec fed fee fef fei fek fel fer ffc ffd ffe fff ffi ffk ffl ffr fic fid fie fif fii fik fil fir fkc fkf fki fkk fkl flc fld fle flf fli fll flr frc frd fre frf fri frk frl frr i-d i-f icc icd ice icf ici ick icl icr idc idd ide idf idi idk idl idr ie- iec ied iee ief iei iek iel ier ifc ifd ife iff ifi ifl ifr iic iid iie iif iii iil iir ikc ike ikf iki ikk ikl ikr il- ilc ild ile ilf ili ilk ill ilr ir- irc ird ire irf iri irk irl irr kcc kcd kce kci kck kcl kcr kdc kde kdf kdk kdl kdr ke- kec ked kee kef kei kek kel ker kfc kfd kff kfi kic kid kie kif kii kik kil kir kkc kke kki kkk kkl kkr kl- klc kld klf kli klr krc krd krf kri krk krl krr lcc lcd lce lcf lci lck lcl lcr ldc ldd lde ldf ldi ldk ldl ldr lec led lee lef lei lek lel ler lfc lfd lfe lff lfi lfk lfl lfr lic lid lie lif lii lik lil lir lkl lkr llc lld lle llf lli llk lll llr lrc lrd lrf lri lrk lrr rcc rcd rce rcf rci rcl rcr rdc rdd rde rdf rdi rdl rdr re- rec red ree ref rei rek rel rer rfc rfd rfe rff rfi rfk rfl rfr ric rid rie rif rii rik ril rir rkc rke rkf rkk rlc rld rle rlf rli rll rlr rrc rrd rrf rri rrk rrl rrr