1~5 DCCBD 6~10 ADACB 11~15 CCCBA 16~20 ABABC 21~25 ACBDA 26~30 CBACA 31~40 CDHIA EJGFB 41~45 BBDCC 46~50 CAAAB 51~56 CADCCC A successful enterprise shouldn't regard profits as its chief goal. It should take social responsibility to promote public welfare.