-er -th c-- ccc cce ccf cch cck cco ccr ccs cct ce- cec cee cef ceh cek ceo cer ces cet cfc cfe cff cfh cfk cfo cfr cfs cft ch- chc che chf chh chk cho chr chs cht ckc ckh cko cks ckt co- coc coe cof coh cok coo cor cos cot crc cre crf crh crk cro crr crs crt csc cse csf csh csk cso csr css cst ctc cte ctf cth ctk cto ctr cts ctt ec- ecc ece ecf ech eck eco ecr ecs ect eec eee eef eek eeo eer ees eet ef- efc efe eff efh efo efr efs eft ehc ehe ehf ehh eho ehr ehs eht ekc eke ekf ekh eko ekr eks ekt eo- eoc eoe eof eoh eok eoo eor eos eot erc ere erf erh erk ero err ers ert es- esc ese esf esh esk eso esr ess est etc ete etf eth etk eto etr ets ett fcc fce fcf fck fco fcr fcs fct fec fee fef feh fek feo fer fes fet ffc ffe fff ffh ffk ffo ffr ffs fft fhc fhe fhf fhh fho fhr fhs fkc fkf fkk fkt foc foe fof foh fok foo for fos fot frc fre frf frh frk fro frr frs frt fsc fse fsf fsh fsk fso fsr fss fst ftc fte ftf fth ftk fto ftr fts ftt hcc hce hcf hch hck hco hcr hcs hct he- hec hee hef heh hek heo her hes het hfc hfe hff hfh hfk hfo hfr hfs hft hhc hhe hhf hhh hhk hho hhr hhs hht hkf hkh hkk hko hkr hks hkt hoc hoe hof hoh hok hoo hor hos hot hr- hrc hre hrf hrh hrk hro hrr hrs hrt hsc hse hsf hsh hsk hsr hss hst htc hte htf hth htk hto htr hts htt k-t kcc kce kch kck kcr kcs kct ke- kec kee kef keh kek keo ker kes ket kfc kff kfh kfo kfs khe khf khh khk kho khr khs kkc kke kkh kkk kkr kks kkt koc koe kof koh kok koo kor kos kot krc krf krk kro krr krs krt ksc kse ksf ksh ksk kso ksr kss kst ktc kte ktf kth ktk kto ktr kts ktt oc- occ ocf och ock oco ocr ocs oct oec oee oef oeh oeo oer oes oet of- ofc ofe off ofo ofr ofs oft ohc ohe ohf ohh oho ohr ohs oht okc oke okk oko okr oks oo- ooc oof ooh ook ooo oor oos oot or- orc ore orf orh ork oro orr ors ort os- osc ose osf osh osk oso osr oss ost ot- otc ote otf oth otk oto otr ots ott rcc rce rcf rch rco rcr rcs rct re- rec ree ref reh rek reo rer res ret rfc rfe rff rfh rfk rfo rfr rfs rft rh- rhc rhe rhf rhh rho rhr rhs rht rkc rke rkf rkk rko rks rkt roc roe rof roh rok roo ror ros rot rrc rrf rrh rrk rrr rrs rrt rsc rse rsf rsh rsk rso rsr rss rst rtc rte rtf rtk rto rtr rts rtt scc sce scf sch sck sco scr scs sct se- sec see sef seh sek seo ser ses set sfc sfe sff sfh sfk sfo sfr sfs sft sh- shc she shf shh shk sho shr shs sht sk- skc ske skf skh skk sko skr sks skt soc soe sof soh sok soo sor sos sot sr- src sre srf srh srk sro srr srs srt ss- ssc sse ssf ssh ssk sso ssr sss sst stc ste stf sth stk sto str sts stt tcc tce tcf tch tck tco tcr tcs tct te- tec tee tef teh tek teo ter tes tet tfc tfe tff tfh tfk tfo tfr tfs tft th- thc the thf thh thk tho thr ths tht tkc tke tkk tko tkr tks tkt to- toc toe tof toh tok too tor tos tot trc tre trf trh trk tro trr trs trt tsc tse tsf tsh tsk tso tsr tss tst ttc tte ttf tth ttk tto ttr tts ttt