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: 5, 6, ['J', '6957', 's', 'l', 'C', 'o', 'H', 'u', 'g', 'P', 'N', 'v', 'S', '6145', 'o', 'z', 'B', 'o', 'E', 'f', '817', 'I', 'k', 'I', '7331', 'x']
Example Output: oC

Example Input: 4, 9, ['8189', 'M', 'Y', '2695', '3381', '3829', '117', '3843', '7469', '3611', 'e', '4127', 'V', 'X', 'V', '4535', 'M']
Example Output: 96473483711928318335962

Example Input: 3, 3, ['z', 'Q', 'a', 'j', 'k', 'u', 'W', 'W', '8011', '6277']
Example Output:
a