-er -ic -ji c-- c-j ccc cce cci ccj ccp ccr ce- cec cee cei cej cep cer ci- cic cie cii cij cip cir cjc cjp cjr cpc cpe cpi cpj cpp cpr crc cre cri crj crp crr ec- ecc ece eci ecj ecr eec eee eep eer eic eie eii eij eip eir ejc eji ejp ep- epc epe epi epp epr erc ere eri erp err icc ice ici icj icp icr ie- iec iee iei iej iep ier iic iie iii iij iip iir ijc ije iji ipc ipe ipi ipp ipr ir- irc ire iri irj irp irr j-i jcc jce jci jcp jcr jec jee jei jej jep jer jic jie jii jij jip jir jjc jjj jjp jjr jpc jpe jpi jpj jpp jpr jrc jri jrp jrr p-p pcc pce pci pcj pcp pcr pec pee pei pep per pic pie pii pij pip pir pjc pji pjp ppc ppe ppi ppj ppp ppr prc pre pri prp prr rcc rce rci rcj rcp rcr re- rec ree rei rep rer ric rie rii rip rir rjc rjp rjr rpc rpe rpi rpp rpr rrc rri rrp rrr