-er c-- ccc cce ccn cco ccp ccr cct ce- cec cee cen ceo cep cer cet cn- cnc cne cnn cno cnp cnr cnt co- coc coe con coo cop cor cot cpc cpe cpn cpo cpp cpr cpt crc cre crn cro crp crr crt ctc cte ctn cto ctp ctr ctt ec- ecc ece ecn eco ecr ect eec eee een eeo eep eer eet en- enc ene enn eno enp enr ent eo- eoc eoe eon eoo eop eor eot ep- epc epe epn epo epp epr ept erc ere ern ero erp err ert etc ete etn eto etp etr ett ncc nce ncn nco ncp ncr nct ne- nec nee nen neo nep ner net nnc nne nnn nno nnp nnt no- noc noe non noo nop nor not npc npe npn npo npp npr npt nrc nre nrn nro nrp nrr nrt ntc nte ntn nto ntp ntr ntt oc- occ ocn oco ocp ocr oct oec oee oen oeo oep oer oet on- onc one onn ono onp onr ont oo- ooc oon ooo oop oor oot op- opc ope opn opo opp opr opt or- orc ore orn oro orp orr ort ot- otc ote otn oto otp otr ott p-p pcc pce pcn pco pcp pcr pct pec pee pen peo pep per pet pn- pnc pne pnn pno pnp pnr pnt poc poe pon poo pop por pot ppc ppe ppn ppo ppp ppr ppt prc pre prn pro prp prr prt pt- ptc pte ptn pto ptp ptr ptt rcc rce rcn rco rcp rcr rct re- rec ree ren reo rep rer ret rnc rnn rno rnp rnr rnt roc roe ron roo rop ror rot rpc rpe rpn rpo rpp rpr rpt rrc rrn rrp rrr rrt rtc rte rtn rto rtp rtr rtt tcc tce tcn tco tcp tcr tct te- tec tee ten teo tep ter tet tnc tne tnn tno tnp tnr tnt to- toc toe ton too top tor tot tpc tpe tpn tpo tpp tpr tpt trc tre trn tro trp trr trt ttc tte ttn tto ttp ttr ttt