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: 3, 5, ['j', '239', '9689', 's', 'C', 'w']
Example Output: Cs9869

Example Input: 2, 7, ['9969', 'u', '9811', 't', 'z', '8347', 'i', 'O', '5897']
Example Output: i7438zt1189u

Example Input: 4, 6, ['m', '113', '13', 'a', '8677', '4525']
Example Output:
52547768a