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]: 19, 20, ['w', '4131', 'C', '719', '2961', 'Q', '4167', '1001', 'p', '965', '1153', '6881', '3361', 'H', 'f', 'V', '9393', 'x', '6091', 'B', '6757', 'U', '2619', '5649', '6447', 'D']
[EX A]: B1906

[EX Q]: 4, 14, ['7575', '9637', '5911', '4727', '1747', '8689', 'N', '631', '253', '9527', 'B', 'n', '3711', 'P', 'A', '9135', '2245', 'Q', 'H', '1347', 'Z', '7929', '3839', '9753', 'M', 'l', 'a', '5765']
[EX A]:
P1173nB7259352136N986874717274