-er -ic c-- ccc ccd cce cci cck ccl ccr cdc cdd cde cdi cdk cdl cdr ce- cec ced cee cei cek cel cer ci- cic cid cie cii cik cil cir ckc ckd cki cl- clc cld cle cli clk cll clr crc crd cre cri crk crl crr dcc dcd dce dci dck dcl dcr ddc ddd dde ddi ddk ddl ddr de- dec ded dee dei dek del der di- dic did die dii dik dil dir dkc dke dki dkk dkl dkr dl- dlc dld dle dli dlk dll dlr drc drd dre dri drk drl drr ec- ecc ecd ece eci eck ecl ecr ed- edc edd ede edi edk edl edr eec eed eee eek eel eer eic eid eie eii eik eil eir ekc ekd eke eki ekl ekr elc eld ele eli elk ell elr erc erd ere eri erk erl err i-d icc icd ice ici ick icl icr idc idd ide idi idk idl idr ie- iec ied iee iei iek iel ier iic iid iie iii iil iir ikc ike iki ikk ikl ikr il- ilc ild ile ili ilk ill ilr ir- irc ird ire iri irk irl irr kcc kcd kce kci kck kcl kcr kdc kde kdk kdl kdr ke- kec ked kee kei kek kel ker kic kid kie kii kik kil kir kkc kke kki kkk kkl kkr kl- klc kld kli klr krc krd kri krk krl krr lcc lcd lce lci lck lcl lcr ldc ldd lde ldi ldk ldl ldr lec led lee lei lek lel ler lic lid lie lii lik lil lir lkl lkr llc lld lle lli llk lll llr lrc lrd lri lrk lrr rcc rcd rce rci rcl rcr rdc rdd rde rdi rdl rdr re- rec red ree rei rek rel rer ric rid rie rii rik ril rir rkc rke rkk rlc rld rle rli rll rlr rrc rrd rri rrk rrl rrr