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]: 2, 3, ['6875', 'D', 'r']
[A]: rD


[Q]: 1, 15, ['3571', 'D', '1249', 'g', '2843', '8589', 'R', '1161', '5653', '1821', 'w', 'b', 'i', 'c', '8247', '1397']
[A]: 7428cibw128135651611R98583482g9421D1753


[Q]: 2, 3, ['6005', '6631', '9145', 'v', '2997', 'O', 'n', '5519', 'B', 'X']
[A]:
54191366