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]: 2, 5, ['e', '7607', '3201', '3421', 'H', '543', '3489']
[EX A]: H342132017607

[EX Q]: 2, 3, ['D', '373', '8515', 'G', 'G', 'c']
[EX A]: 8515373

[EX Q]: 2, 7, ['5121', 'x', 'n', 'q', 'u', 'g', '6713', 'J', 'g', '4661', 'D', 'V']
[EX A]:
6713guqnx