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

Ex Output:
lc4801a9574935D8829Emz


Ex Input:
12, 17, ['8471', '9863', '8113', 'v', 'R', '1465', 'Q', '7039', '3795', '1969', '7215', '7069', 'k', 'e', '8401', 's', '961']

Ex Output:
961s8401ek7069


Ex Input:
5, 9, ['2581', 'k', '6085', 'X', 'k', 'R', '4133', 'u', 't', 'u', 'Q', '1253', '6213', 'q', 'd', '8583', 'Y', 'r', '6019', 'D']

Ex Output:

tu4133Rk