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 Input:
3, 20, ['m', '9539', 'y', 'E', 'E', 'C', 'y', 'M', 'G', 'N', '4167', '2753', 'e', '8259', 'c', '6333', 'k', 'c', '471', '6461', 'w', '8919', '3849', 'm', 't', '6973', 'K']

Ex Output:
6461471ck6333c8259e27534167NGMyCEEy


Ex Input:
2, 5, ['B', 'I', 'X', '2953', 'J', '303', '6521', 'l', 'o', '5279', 'd', 'l', '9565']

Ex Output:
J2953XI


Ex Input:
3, 6, ['S', 'P', '2555', '9063', '4337', 'r', '3641', '2153', 'I', 'c', '585', '4391', 'O', 'b', '6433', '5239', 'W', '951', 'r', 'Q', 'N']

Ex Output:

r433790632555