In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.

[Q]: 3, 4, ['P', '7535', '9919', '5299', '8521', 'q', 'q', 'i']
[A]: 52999919


[Q]: 6, 11, ['49', 'n', 'R', '3171', '8781', '8973', '5647', '8111', '8795', '7361', '3335', 'B']
[A]: 333573618795811156478973


[Q]: 1, 4, ['2639', '497', '2353', '5375', '1053', '6001']
[A]:
537523534972639