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, 2, ['7921', 'Q']
[EX A]: Q7921

[EX Q]: 10, 13, ['c', '9643', '191', 'N', 'n', '2273', 'a', 'q', 'T', '7775', 'v', 'c', '8889', 'G', '533']
[EX A]: 8889cv7775

[EX Q]: 6, 10, ['Q', 'o', 'b', '5237', '2327', '6367', '797', 'V', '4465', 'C', '5985', 'V', '5045', '7967', 'P']
[EX A]:
C4465V7976367