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.

Example Input: 6, 6, ['X', '939', 'u', 'V', 'Z', 'x', 't', '5703', '5669', 'z', 'D', '7013', '9807', 'N', 's', '5075', 'd', 'T', '1275', '1475', 'r', 'k']
Example Output: x

Example Input: 4, 17, ['897', 'R', 'L', '201', 'Z', 'o', 'A', '9367', 'E', 'G', '6653', 'i', 'V', 'F', '9433', 'G', '8073', '5739', '7009']
Example Output: 3708G3349FVi3566GE7639AoZ102

Example Input: 15, 18, ['S', '9651', '751', '8059', 'y', 'U', '529', '9311', 'x', 'd', 'R', '2485', '9773', '6467', 'l', 'a', '2845', 'U', '8617']
Example Output:
U5482al