Detailed Instructions: 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.
Q: 20, 29, ['8173', '6645', '2877', '3157', 'C', 'H', '1429', 's', 'Q', '2107', 'w', 's', '6377', '4659', '7003', 'm', '7931', 'D', '9691', '8707', 'o', 'm', '3757', 'x', 'v', '7979', 'W', '2925', 'R']
A:
R5292W9797vx7573mo7078