-er -ic c-- ccc cce ccf cci cck ccl ccr ccs cct ce- cec cee cef cei cek cel cer ces cet cfc cfe cff cfi cfk cfl cfr cfs cft ci- cic cie cif cii cik cil cir cis cit ckc cki cks ckt cl- clc cle clf cli clk cll clr cls clt crc cre crf cri crk crl crr crs crt csc cse csf csi csk csl csr css cst ctc cte ctf cti ctk ctl ctr cts ctt ec- ecc ece ecf eci eck ecl ecr ecs ect eec eee eef eek eel eer ees eet ef- efc efe eff efi efl efr efs eft eic eie eif eii eik eil eir eis eit ekc eke ekf eki ekl ekr eks ekt elc ele elf eli elk ell elr els elt erc ere erf eri erk erl err ers ert es- esc ese esf esi esk esl esr ess est etc ete etf eti etk etl etr ets ett fcc fce fcf fci fck fcl fcr fcs fct fec fee fef fei fek fel fer fes fet ffc ffe fff ffi ffk ffl ffr ffs fft fic fie fif fii fik fil fir fis fit fkc fkf fki fkk fkl fkt flc fle flf fli fll flr fls flt frc fre frf fri frk frl frr frs frt fsc fse fsf fsi fsk fsl fsr fss fst ftc fte ftf fti ftk ftl ftr fts ftt i-f icc ice icf ici ick icl icr ics ict ie- iec iee ief iei iek iel ier ies iet ifc ife iff ifi ifl ifr ifs ift iic iie iif iii iil iir iis iit ikc ike ikf iki ikk ikl ikr iks ikt il- ilc ile ilf ili ilk ill ilr ils ilt ir- irc ire irf iri irk irl irr irs irt is- isc ise isf isi isk isl isr iss ist itc ite itf iti itk itl its itt k-t kcc kce kci kck kcl kcr kcs kct ke- kec kee kef kei kek kel ker kes ket kfc kff kfi kfs kic kie kif kii kik kil kir kis kit kkc kke kki kkk kkl kkr kks kkt kl- klc klf kli klr kls klt krc krf kri krk krl krr krs krt ksc kse ksf ksi ksk ksl ksr kss kst ktc kte ktf ktk ktl ktr kts ktt lcc lce lcf lci lck lcl lcr lcs lct lec lee lef lei lek lel ler les let lfc lfe lff lfi lfk lfl lfr lfs lft lic lie lif lii lik lil lir lis lit lkl lkr lks lkt llc lle llf lli llk lll llr lls llt lrc lrf lri lrk lrr lrs lrt lsc lse lsf lsi lsk lsl lsr lss lst ltc lte ltf lti ltk ltl ltr lts ltt rcc rce rcf rci rcl rcr rcs rct re- rec ree ref rei rek rel rer res ret rfc rfe rff rfi rfk rfl rfr rfs rft ric rie rif rii rik ril rir ris rit rkc rke rkf rkk rks rkt rlc rle rlf rli rll rlr rls rlt rrc rrf rri rrk rrl rrr rrs rrt rsc rse rsf rsi rsk rsl rsr rss rst rtc rte rtf rti rtk rtl rtr rts rtt scc sce scf sci sck scl scr scs sct se- sec see sef sei sek sel ser ses set sfc sfe sff sfi sfk sfl sfr sfs sft sic sie sif sii sik sil sir sis sit sk- skc ske skf ski skk skl skr sks skt slc sle slf sli slk sll slr sls slt sr- src sre srf sri srk srl srr srs srt ss- ssc sse ssf ssi ssk ssl ssr sss sst stc ste stf sti stk stl str sts stt tcc tce tcf tci tck tcl tcr tcs tct te- tec tee tef tei tek tel ter tes tet tfc tfe tff tfi tfk tfl tfr tfs tft tic tie tif tii tik til tir tis tit tkc tke tkk tkl tkr tks tkt tlc tle tlf tli tlk tll tlr tls tlt trc tre trf tri trk trl trr trs trt tsc tse tsf tsi tsk tsl tsr tss tst ttc tte ttf tti ttk ttl ttr tts ttt