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, 4, ['Z', 'P', '7969', '7221', 'a', '5397']

Ex Output:
72217969


Ex Input:
6, 15, ['7969', 'z', '7061', 'J', 'T', '7917', '7225', '7907', '8333', 'U', 'w', 'Y', '4729', '2461', 'X', 'k']

Ex Output:
X24614729YwU8333790772257917


Ex Input:
13, 18, ['6061', '1757', '8837', 'j', '5425', '2421', 'u', '7887', '3757', 'L', 'E', '8317', 'O', '9507', 'm', '3229', '6091', 's', 'V', '459', 'r', 'T']

Ex Output:

s60913229m9507O