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, 3, ['i', '7465', '1315']
[EX A]: 51315647

[EX Q]: 22, 26, ['V', 'O', '511', 'c', '4015', 'P', 'R', 'L', '115', 'L', '6809', 'S', '2397', 'X', 'e', 'Y', 'I', 'O', '8125', 'u', 'r', '9403', 'Q', 'i', '5835', 'U', 'm']
[EX A]: U5385iQ3049

[EX Q]: 5, 16, ['2009', 'k', '9935', 'a', 'f', 'L', 'H', '5499', '5301', 'i', '3977', 'n', 'f', '9723', '9635', '4851']
[EX A]:
158453693279fn7793i10359945HLf