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.

[EX Q]: 1, 3, ['u', 'D', '6391']
[EX A]: 6391Du

[EX Q]: 14, 19, ['z', '1543', 'b', 'd', '3025', '4649', '1171', '3355', '307', 'u', 'v', '1651', 'U', '9105', 'I', 'p', 'L', 'N', '9843', 'm']
[EX A]: 9843NLpI9105

[EX Q]: 3, 8, ['9885', 'C', '5539', '6953', 'P', '5971', 'P', '4921', '6433', '2071', 'R', 'j', '2761', '4523', '311', 'T', '4245', '4121', '495', 's', '733', 'm', '9149', '4641', '6169']
[EX A]:
4921P5971P69535539