-er -ic -up c-- ccc cce cci cck ccp ccr ccu ce- cec cee cei cek cep cer ceu ci- cic cie cii cik cip cir ciu ckc cki cpc cpe cpi cpk cpp cpr cpu crc cre cri crk crp crr cru cuc cue cui cuk cup cur cuu ec- ecc ece eci eck ecr ecu eec eee eek eep eer eic eie eii eik eip eir eiu ekc eke eki ekp ekr eku ep- epc epe epi epp epr epu erc ere eri erk erp err eru eu- euc eue eui eup eur icc ice ici ick icp icr icu ie- iec iee iei iek iep ier iic iie iii iip iir iiu ikc ike iki ikk ikr iku ipc ipe ipi ipp ipr ipu ir- irc ire iri irk irp irr iru iu- iuc iue iui iup iur kcc kce kci kck kcp kcr kcu ke- kec kee kei kek kep ker kic kie kii kik kip kir kiu kkc kke kki kkk kkp kkr kku kpc kpe kpi kpk kpp kpr kpu krc kri krk krp krr kru kuc kue kui kuk kup kur kuu p-p pcc pce pci pck pcp pcr pcu pec pee pei pek pep per peu pic pie pii pik pip pir piu pkc pke pki pkp pkr pku ppc ppe ppi ppk ppp ppr ppu prc pre pri prk prp prr pru puc pue pui puk pup pur puu rcc rce rci rcp rcr rcu re- rec ree rei rek rep rer reu ric rie rii rik rip rir rkc rke rkk rkp rku rpc rpe rpi rpk rpp rpr rpu rrc rri rrk rrp rrr rru ruc rue rui ruk rup rur ruu ucc uce uci uck ucp ucr ucu uec uee uei uep uer uic uie uii uip uir uiu ukc uke uki ukk ukp ukr uku up- upc upe upi upk upp upr upu ur- urc ure uri urk urp urr uru uuc uue uur uuu