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.

[Q]: 1, 3, ['2119', '2237', 'O']
[A]: O73229112


[Q]: 2, 4, ['B', '5601', 'v', '7431', 'z']
[A]: 1347v1065


[Q]: 2, 7, ['J', 'W', '9607', '861', '3013', '2021', '8647', '5553', '9595', '8019', 'R', 'u', 's', '8491', '2889', '5589', '869', '5371', '1707', '2653', '6597', '9241', 'z', '7481']
[A]:
7468120231031687069W