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:
16, 20, ['7675', 'c', '9729', '8219', 'P', '9939', '9217', 'C', '4067', '549', 'g', 'w', '3793', 'I', 'U', 'R', 'S', '2615', 'h', 'M', '889']

Ex Output:
Mh2615SR


Ex Input:
1, 3, ['U', '1175', 'm', 'S', 't', 's', 'o', '6357', 'G', 'x', 'H', '8917']

Ex Output:
m1175U


Ex Input:
1, 2, ['1955', '5401', '2627', '4743', 'T', 'W']

Ex Output:

54011955