In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting string. 'i' and 'j' will be non-negative, and will always have a value less than the length of A. 'i' will always be less than 'j'. Perform the operations in order, i.e., do not reverse first and then concatenate.

1, 2, ['4857', '9647']
74697584

9, 17, ['q', 'L', '2499', 's', 'P', 'e', 'C', '2667', '4561', '9953', '9901', '61', '3901', '3237', '1169', '5841', 'E', '8981', 'Q', 'W', 'B', '5513', 'F', 'D', 'g', '5463', 'v', '931', 'P']
E148596117323109316109935991654

17, 21, ['8099', 'a', 'O', '1641', 'a', 'r', '1753', '9581', '1021', '9913', 'o', 'z', 'o', 'm', '4777', '6569', '2513', '6339', 'e', 'Y', '5627', 'C', '9593', 'w']

7265Ye93363152