-er -ey c-- ccc ccd cce cck cco ccr ccs cct cdc cdd cde cdk cdo cdr cds cdt cdy ce- cec ced cee cek ceo cer ces cet cey ckc ckd cko cks ckt cky co- coc cod coe cok coo cor cos cot coy crc crd cre crk cro crr crs crt cry csc csd cse csk cso csr css cst csy ctc ctd cte ctk cto ctr cts ctt cty cyc cyd cye cyk cyo cyr cys cyt dcc dcd dce dck dco dcr dcs dct ddc ddd dde ddk ddo ddr dds ddt ddy de- dec ded dee dek deo der des det dey dkc dke dkk dko dkr dks dkt doc dod doe dok doo dor dos dot doy drc drd dre drk dro drr drs drt dry dsc dsd dse dsk dso dsr dss dst dsy dtc dtd dte dtk dto dtr dts dtt dty dy- dyc dyd dye dyk dyo dyr dys dyy ec- ecc ecd ece eck eco ecr ecs ect ed- edc edd ede edk edo edr eds edt edy eec eed eee eek eeo eer ees eet eey ekc ekd eke eko ekr eks ekt eky eo- eoc eod eoe eok eoo eor eos eot erc erd ere erk ero err ers ert ery es- esc esd ese esk eso esr ess est esy etc etd ete etk eto etr ets ett ety eyc eyd eye eyo eyr eys eyt k-t kcc kcd kce kck kcr kcs kct kdc kde kdk kdo kdr kds kdt kdy ke- kec ked kee kek keo ker kes ket key kkc kke kkk kkr kks kkt kky koc kod koe kok koo kor kos kot koy krc krd krk kro krr krs krt kry ksc ksd kse ksk kso ksr kss kst ktc kte ktk kto ktr kts ktt kyc kyd kye kyo kyr kys kyt oc- occ ocd ock oco ocr ocs oct odc odd ode odo odr ods odt oec oed oee oeo oer oes oet oey okc okd oke okk oko okr oks oo- ooc ood ook ooo oor oos oot or- orc ord ore ork oro orr ors ort ory os- osc osd ose osk oso osr oss ost ot- otc otd ote otk oto otr ots ott oyd oye oyo oys rcc rcd rce rco rcr rcs rct rdc rdd rde rdo rdr rds rdt rdy re- rec red ree rek reo rer res ret rey rkc rke rkk rko rks rkt rky roc rod roe rok roo ror ros rot roy rrc rrd rrk rrr rrs rrt rsc rsd rse rsk rso rsr rss rst rtc rtd rte rtk rto rtr rts rtt rty ry- ryc ryd rye ryk ryo ryr rys ryy scc scd sce sck sco scr scs sct sdc sdd sde sdk sdo sdr sds sdt sdy se- sec sed see sek seo ser ses set sey sk- skc skd ske skk sko skr sks skt sky soc sod soe sok soo sor sos sot soy sr- src srd sre srk sro srr srs srt sry ss- ssc ssd sse ssk sso ssr sss sst stc std ste stk sto str sts stt sty sy- syc syd sye syk syr sys syt tcc tcd tce tck tco tcr tcs tct tdc tdd tde tdk tdo tdr tds tdt tdy te- tec ted tee tek teo ter tes tet tey tkc tke tkk tko tkr tks tkt tky to- toc tod toe tok too tor tos tot toy trc trd tre trk tro trr trs trt try tsc tsd tse tsk tso tsr tss tst tsy ttc ttd tte ttk tto ttr tts ttt tty tyc tyd tye tyo tyr tys tyt ycc ycd yce yco ycs ycy yde ydo yds ydt ydy yec yed yee yek yeo yer yes yet yey ykk yoc yod yoe yok yoo yor yos yot yoy yrc yre yro yrs yrt ysc yse ysk yso ysr yss yst ysy ytc ytd yte ytk yto ytr yts ytt yyc yye yys yyt yyy