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

[EX Q]: 10, 17, ['W', 'x', '2433', 'n', '5801', '7423', 'o', '491', 'Q', 'Z', '153', '129', 'e', '4249', 'K', '887', 'L', 'q', 'M', 'V', 'G', '331']
[EX A]: L887K4249e129153Z

[EX Q]: 15, 21, ['d', '609', 'Q', '6031', '629', 'I', 'M', '7403', '9155', 'w', 's', 'v', 'd', 'm', '5551', '9701', 'D', '7849', '9675', '1671', '3557']
[EX A]:
3557167196757849D97015551