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: 17, 21, ['5503', '2979', '6307', '633', 'n', '9339', '5829', '5291', '8967', 'i', '9063', '975', 'G', '9187', '3227', 'A', '3487', '8187', 'H', '6097', 'H']
Example Output: H7906H78187843

Example Input: 6, 7, ['753', '4657', 'h', '13', '593', 'I', '7689', '717']
Example Output: 9867I

Example Input: 5, 15, ['p', 'm', '6263', '4299', '2051', '4851', '641', 'g', '4737', 'K', 'm', 'i', '4951', '8685', '4325', 'N', '2565', 'z', 'H', 'Q', '699', '2805', 'a', '6249', '5665', '6757', 'K', 'L', 'Z']
Example Output:
523458681594imK7374g14615841502