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]: 2, 10, ['V', '7549', '4639', '3825', '4619', 'w', '7667', '557', 'L', 'z', '1883', 'k', 'j', 'o', 'p', '3945', 'u', 'l', '5637']
[EX A]: zL7557667w9164528393649457

[EX Q]: 16, 16, ['4793', '8319', 'F', 'L', 'W', 'f', '3003', 'P', 'w', '8231', 'J', 'D', '5091', '5577', 'w', '2211', 'Q', 'a', 'd', '3203', 'v', 'U', '7765', 'S', 'K', '2737', 'R', 'D', 'r', '5487']
[EX A]: 1122

[EX Q]: 6, 6, ['u', '5277', 'q', 'c', 'z', 'Z', '8041', 'X', '2219', '7603', 'X', '9395', 'c', '9477', 'k', '6095']
[EX A]:
Z