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.

11, 15, ['807', '2753', 'L', '8633', '7203', 'j', 'a', 'r', 'R', 'q', 'g', 'B', 't', '1373', '3371', 'S', '9977', 'y']
17333731tBg

4, 8, ['g', '6711', '6701', 'p', '6345', 'W', '9953', '3185', 'W']
58133599W5436p

3, 16, ['z', 'j', 'q', 'u', '4625', 'y', 'w', '5457', '3025', 'x', 't', '8295', 'B', 's', 'o', 'B', '423', 'C', 'E']

BosB5928tx52037545wy5264uq