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.

20, 26, ['9693', 'i', '8753', 'f', '9131', 'v', '2831', '1541', 's', '8307', '373', 's', 'z', '4929', 'I', '741', 'K', '7767', '2557', 'f', '887', 'g', '779', 'k', '5967', '4947', '2373', '7251', '8841', '3277']
74947695k977g788f

1, 8, ['X', 'I', '9323', 'A', 'v', 'd', '7685', 'Z', 'p']
Z5867dvA3239IX

3, 5, ['3331', 'r', 'R', '5277', 'O', '7319', 'Y', '6571', '2817', 'f', '4587', 'u', '6707']

O7725R