-er -ic c-- ccc cce cci cck cco ccp ccr ccs cct ce- cec cee cei cek ceo cep cer ces cet ci- cic cie cii cik cio cip cir cis cit ckc cki cko cks ckt co- coc coe coi cok coo cop cor cos cot cpc cpe cpi cpk cpo cpp cpr cps cpt crc cre cri crk cro crp crr crs crt csc cse csi csk cso csp csr css cst ctc cte cti ctk cto ctp ctr cts ctt ec- ecc ece eci eck eco ecr ecs ect eec eee eek eeo eep eer ees eet eic eie eii eik eio eip eir eis eit ekc eke eki eko ekp ekr eks ekt eo- eoc eoe eoi eok eoo eop eor eos eot ep- epc epe epi epo epp epr eps ept erc ere eri erk ero erp err ers ert es- esc ese esi esk eso esp esr ess est etc ete eti etk eto etp etr ets ett icc ice ici ick ico icp icr ics ict ie- iec iee iei iek iep ier ies iet iic iie iii iio iip iir iis iit ikc ike iki ikk iko ikr iks ikt io- ioc ioe ioi ioo iop ior ios iot ipc ipe ipi ipo ipp ipr ips ipt ir- irc ire iri irk iro irp irr irs irt is- isc ise isi isk iso isp isr iss ist itc ite iti itk ito itp its itt k-t kcc kce kci kck kcp kcr kcs kct ke- kec kee kei kek keo kep ker kes ket kic kie kii kik kio kip kir kis kit kkc kke kki kkk kkp kkr kks kkt koc koe koi kok koo kop kor kos kot kpc kpe kpi kpk kpo kpp kpr kps kpt krc kri krk kro krp krr krs krt ksc kse ksi ksk kso ksp ksr kss kst ktc kte ktk kto ktp ktr kts ktt o-i oc- occ oci ock oco ocp ocr ocs oct oec oee oei oeo oep oer oes oet oic oie oii oik oio oip oir ois oit okc oke oki okk oko okp okr oks oo- ooc ooi ook ooo oop oor oos oot op- opc ope opi opk opo opp opr ops opt or- orc ore ori ork oro orp orr ors ort os- osc ose osi osk oso osp osr oss ost ot- otc ote oti otk oto otp otr ots ott p-p pcc pce pci pck pco pcp pcr pcs pct pec pee pei pek peo pep per pes pet pic pie pii pik pio pip pir pis pit pkc pke pki pko pkp pkr pks pkt poc poe poi pok poo pop por pos pot ppc ppe ppi ppk ppo ppp ppr pps ppt prc pre pri prk pro prp prr prs prt ps- psc pse psi psk pso psp psr pss pst pt- ptc pte pti ptk pto ptp ptr pts ptt rcc rce rci rco rcp rcr rcs rct re- rec ree rei rek reo rep rer res ret ric rie rii rik rio rip rir ris rit rkc rke rkk rko rkp rks rkt roc roe roi rok roo rop ror ros rot rpc rpe rpi rpk rpo rpp rpr rps rpt rrc rri rrk rrp rrr rrs rrt rsc rse rsi rsk rso rsp rsr rss rst rtc rte rti rtk rto rtp rtr rts rtt scc sce sci sck sco scp scr scs sct se- sec see sei sek seo sep ser ses set sic sie sii sik sio sip sir sis sit sk- skc ske ski skk sko skp skr sks skt soc soe soi sok soo sop sor sos sot spc spe spi spk spo spp spr sps spt sr- src sre sri srk sro srp srr srs srt ss- ssc sse ssi ssk sso ssp ssr sss sst stc ste sti stk sto stp str sts stt tcc tce tci tck tco tcp tcr tcs tct te- tec tee tei tek teo tep ter tes tet tic tie tii tik tio tip tir tis tit tkc tke tkk tko tkp tkr tks tkt to- toc toe toi tok too top tor tos tot tpc tpe tpi tpk tpo tpp tpr tps tpt trc tre tri trk tro trp trr trs trt tsc tse tsi tsk tso tsp tsr tss tst ttc tte tti ttk tto ttp ttr tts ttt