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:
1, 3, ['Y', 'k', 'P', '1517', 'z', '8727', 'U']

Ex Output:
PkY


Ex Input:
5, 6, ['g', 'H', '9957', 'C', '599', '4297', 'E']

Ex Output:
4297599


Ex Input:
1, 1, ['c', '3453', '1457', 'R', '2681', 'g', '5087']

Ex Output:

c