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: 30, 30, ['7149', 't', 'W', '5821', '1189', '4423', 'T', 'x', '5131', '9015', 'H', 'k', 'J', '9951', '5697', '1953', 'X', '8691', '3581', '7319', '6977', '8031', '6179', '2109', 'F', 'Y', 'G', '1065', 'y', '869']
Example Output: 968

Example Input: 3, 4, ['E', 'k', '4697', 'f', 'J', 's', '1265', '4673', 'D', '3345', 'n', '5593', '2249', '5951']
Example Output: f7964

Example Input: 1, 8, ['s', 'Q', 'c', '8555', 't', 'v', 'j', '1389', 'g', '5993', '1311', '1291', '8283', 'M', '2991', 'S']
Example Output:
9831jvt5558cQs