-er a-a a-c aaa aac aae aaj aar ac- aca acc ace acj acr aea aec aee aej aer aja ajc aje ajj ajr ar- ara arc are arj arr c-- c-j caa cac cae caj car cca ccc cce ccj ccr ce- cea cec cee cej cer cja cjc cjr cra crc cre crj crr eaa eac eae eaj ear ec- eca ecc ece ecj ecr eea eec eee eer eja ejc era erc ere err jaa jac jae jaj jar jca jcc jce jcr jea jec jee jej jer jja jjc jjj jjr jra jrc jrr ra- raa rac rae raj rar rca rcc rce rcj rcr re- rea rec ree rer rja rjc rjr rra rrc rrr