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: 19, 26, ['4699', 'J', 'o', '7127', 'A', 'r', 't', '2571', 'Z', 'A', 'i', 'V', '2275', '3277', 'T', 'C', 'k', '975', '5591', '4205', '9873', '141', '9775', 'w', '111', '2585', '8751', '2173']
Example Output: 5852111w5779141378950241955

Example Input: 1, 12, ['f', '8665', '6205', 'L', 'y', 'P', '9351', 'k', '1387', '657', 's', 'k']
Example Output: ks7567831k1539PyL50265668f

Example Input: 5, 20, ['509', '1165', 'J', 'f', '5169', 'd', 'j', '2379', 'K', '1667', '6551', '6333', 'm', '6085', 'U', '6251', '4943', 'a', '4741', 'j', '2087', '4079']
Example Output:
j1474a34941526U5806m333615567661K9732jd9615