-er -ic c-- ccc ccd cce cci cck ccl ccr cct cdc cdd cde cdi cdk cdl cdr cdt ce- cec ced cee cei cek cel cer cet ci- cic cid cie cii cik cil cir cit ckc ckd cki ckt cl- clc cld cle cli clk cll clr clt crc crd cre cri crk crl crr crt ctc ctd cte cti ctk ctl ctr ctt dcc dcd dce dci dck dcl dcr dct ddc ddd dde ddi ddk ddl ddr ddt de- dec ded dee dei dek del der det di- dic did die dii dik dil dir dit dkc dke dki dkk dkl dkr dkt dl- dlc dld dle dli dlk dll dlr dlt drc drd dre dri drk drl drr drt dtc dtd dte dti dtk dtl dtr dtt ec- ecc ecd ece eci eck ecl ecr ect ed- edc edd ede edi edk edl edr edt eec eed eee eek eel eer eet eic eid eie eii eik eil eir eit ekc ekd eke eki ekl ekr ekt elc eld ele eli elk ell elr elt erc erd ere eri erk erl err ert etc etd ete eti etk etl etr ett i-d icc icd ice ici ick icl icr ict idc idd ide idi idk idl idr idt ie- iec ied iee iei iek iel ier iet iic iid iie iii iil iir iit ikc ike iki ikk ikl ikr ikt il- ilc ild ile ili ilk ill ilr ilt ir- irc ird ire iri irk irl irr irt itc itd ite iti itk itl itt k-t kcc kcd kce kci kck kcl kcr kct kdc kde kdk kdl kdr kdt ke- kec ked kee kei kek kel ker ket kic kid kie kii kik kil kir kit kkc kke kki kkk kkl kkr kkt kl- klc kld kli klr klt krc krd kri krk krl krr krt ktc kte ktk ktl ktr ktt lcc lcd lce lci lck lcl lcr lct ldc ldd lde ldi ldk ldl ldr ldt lec led lee lei lek lel ler let lic lid lie lii lik lil lir lit lkl lkr lkt llc lld lle lli llk lll llr llt lrc lrd lri lrk lrr lrt ltc ltd lte lti ltk ltl ltr ltt rcc rcd rce rci rcl rcr rct rdc rdd rde rdi rdl rdr rdt re- rec red ree rei rek rel rer ret ric rid rie rii rik ril rir rit rkc rke rkk rkt rlc rld rle rli rll rlr rlt rrc rrd rri rrk rrl rrr rrt rtc rtd rte rti rtk rtl rtr rtt tcc tcd tce tci tck tcl tcr tct tdc tdd tde tdi tdk tdl tdr tdt te- tec ted tee tei tek tel ter tet tic tid tie tii tik til tir tit tkc tke tkk tkl tkr tkt tlc tld tle tli tlk tll tlr tlt trc trd tre tri trk trl trr trt ttc ttd tte tti ttk ttl ttr ttt