-er -ic -up c-- ccc cce ccf cci cck cco ccp ccr ccu ce- cec cee cef cei cek ceo cep cer ceu cfc cfe cff cfi cfk cfo cfp cfr cfu ci- cic cie cif cii cik cio cip cir ciu ckc cki cko co- coc coe cof coi cok coo cop cor cou cpc cpe cpf cpi cpk cpo cpp cpr cpu crc cre crf cri crk cro crp crr cru cuc cue cuf cui cuk cuo cup cur cuu ec- ecc ece ecf eci eck eco ecr ecu eec eee eef eek eeo eep eer ef- efc efe eff efi efo efp efr eic eie eif eii eik eio eip eir eiu ekc eke ekf eki eko ekp ekr eku eo- eoc eoe eof eoi eok eoo eop eor eou ep- epc epe epf epi epo epp epr epu erc ere erf eri erk ero erp err eru eu- euc eue euf eui eup eur fcc fce fcf fci fck fco fcp fcr fcu fec fee fef fei fek feo fep fer feu ffc ffe fff ffi ffk ffo ffp ffr ffu fic fie fif fii fik fip fir fiu fkc fkf fki fkk fkp foc foe fof foi fok foo fop for fou fpc fpe fpi fpk fpo fpp fpr fpu frc fre frf fri frk fro frp frr fru fue fuf fui fuk fuo fup fur fuu i-f icc ice icf ici ick ico icp icr icu ie- iec iee ief iei iek iep ier ifc ife iff ifi ifo ifp ifr ifu iic iie iif iii iio iip iir iiu ikc ike ikf iki ikk iko ikr iku io- ioc ioe iof ioi ioo iop ior iou ipc ipe ipf ipi ipo ipp ipr ipu ir- irc ire irf iri irk iro irp irr iru iu- iuc iue iui iup iur kcc kce kci kck kcp kcr kcu ke- kec kee kef kei kek keo kep ker kfc kff kfi kfo kfu kic kie kif kii kik kio kip kir kiu kkc kke kki kkk kkp kkr kku koc koe kof koi kok koo kop kor kou kpc kpe kpf kpi kpk kpo kpp kpr kpu krc krf kri krk kro krp krr kru kuc kue kui kuk kup kur kuu o-i oc- occ ocf oci ock oco ocp ocr ocu oec oee oef oei oeo oep oer of- ofc ofe off ofi ofo ofp ofr ofu oic oie oif oii oik oio oip oir oiu okc oke oki okk oko okp okr oku oo- ooc oof ooi ook ooo oop oor op- opc ope opf opi opk opo opp opr or- orc ore orf ori ork oro orp orr oru ou- ouc oue ouf oui ouk ouo oup our p-p pcc pce pcf pci pck pco pcp pcr pcu pec pee pef pei pek peo pep per peu pfc pfe pff pfi pfk pfo pfp pfr pfu pic pie pif pii pik pio pip pir piu pkc pke pkf pki pko pkp pkr pku poc poe pof poi pok poo pop por pou ppc ppe ppf ppi ppk ppo ppp ppr ppu prc pre prf pri prk pro prp prr pru puc pue puf pui puk pup pur puu rcc rce rcf rci rco rcp rcr rcu re- rec ree ref rei rek reo rep rer reu rfc rfe rff rfi rfk rfo rfp rfr rfu ric rie rif rii rik rio rip rir rkc rke rkf rkk rko rkp rku roc roe rof roi rok roo rop ror rou rpc rpe rpf rpi rpk rpo rpp rpr rpu rrc rrf rri rrk rrp rrr rru ruc rue ruf rui ruk ruo rup rur ruu ucc uce ucf uci uck uco ucp ucr ucu uec uee uef uei uep uer ufc ufe uff ufi ufo ufp ufr ufu uic uie uif uii uio uip uir uiu ukc uke ukf uki ukk ukp ukr uku uoc uoe uok uoo uop uor up- upc upe upf upi upk upo upp upr upu ur- urc ure urf uri urk uro urp urr uru uuc uue uur uuu