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.

[EX Q]: 13, 17, ['k', 'f', 'C', '1551', 'Y', '2149', 'r', 'R', '5875', 'C', 'Y', '2145', 'O', 'b', 'M', 'y', '7407', 'X', '1227', 'F', 'n']
[EX A]: 7047yMbO

[EX Q]: 1, 18, ['4729', '2591', '5309', 'L', 'F', '4977', 'I', 'E', '189', 'g', 'T', '3251', 'O', 'Z', '511', 'd', 'L', 'w']
[EX A]: wLd115ZO1523Tg981EI7794FL903519529274

[EX Q]: 9, 22, ['o', '3767', 'j', '4743', 'k', '2071', '1493', '6483', 'H', '1497', '3009', '6153', 'd', '2695', 'b', '8541', 'M', '6181', 'N', 'Q', 'L', '9199', '2821', 'Q']
[EX A]:
9919LQN1816M1458b5962d351690037941H