-er -ic -ji c-- c-j ccc cce cci ccj ccr ccs ce- cec cee cei cej cer ces ci- cic cie cii cij cir cis cjc cjr cjs crc cre cri crj crr crs csc cse csi csj csr css ec- ecc ece eci ecj ecr ecs eec eee eer ees eic eie eii eij eir eis ejc eji erc ere eri err ers es- esc ese esi esr ess icc ice ici icj icr ics ie- iec iee iei iej ier ies iic iie iii iij iir iis ijc ije iji ijs ir- irc ire iri irj irr irs is- isc ise isi isj isr iss j-i jcc jce jci jcr jcs jec jee jei jej jer jes jic jie jii jij jir jis jjc jjj jjr jjs jrc jri jrr jrs jsc jse jsi jsj jsr jss rcc rce rci rcj rcr rcs re- rec ree rei rer res ric rie rii rir ris rjc rjr rrc rri rrr rrs rsc rse rsi rsj rsr rss scc sce sci scj scr scs se- sec see sei sej ser ses sic sie sii sij sir sis sjc sje sji sjj sjr sjs sr- src sre sri srj srr srs ss- ssc sse ssi ssj ssr sss