-er a-a a-c aaa aac aae aaj aan aar ac- aca acc ace acj acn acr aea aec aee aej aen aer aja ajc aje ajj ajn ajr an- ana anc ane anj ann anr ar- ara arc are arj arn arr c-- c-j caa cac cae caj can car cca ccc cce ccj ccn ccr ce- cea cec cee cej cen cer cja cjc cjr cn- cna cnc cne cnj cnn cnr cra crc cre crj crn crr eaa eac eae eaj ean ear ec- eca ecc ece ecj ecn ecr eea eec eee een eer eja ejc en- ena enc ene enn enr era erc ere ern err jaa jac jae jaj jan jar jca jcc jce jcr jea jec jee jej jen jer jja jjc jjj jjr jna jnc jne jnj jnn jnr jra jrc jrn jrr naa nac nae naj nan nar nca ncc nce ncn ncr ne- nea nec nee nej nen ner nja njc nje njn nna nnc nne nnn nra nrc nre nrj nrn nrr ra- raa rac rae raj ran rar rca rcc rce rcj rcn rcr re- rea rec ree ren rer rja rjc rjr rna rnc rnn rnr rra rrc rrn rrr