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]: 3, 3, ['U', '8399', '645', '3165']
[EX A]: 645

[EX Q]: 5, 15, ['X', 'W', 'B', '1047', 'z', 'm', 'E', '8829', 'D', '4935', '957', 'a', '4801', 'c', 'l', 'j']
[EX A]: lc4801a9574935D8829Emz

[EX Q]: 1, 2, ['n', 'h', 'U', 'I', 'h', '1877']
[EX A]:
hn