In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.

Ex Input:
10, 11, ['6929', 'l', '8541', 'L', '7495', '7707', '8839', '6687', 'L', '5125', 'd', 'F', '7', '4357', 'w', 'R', '2459', '9871', 'E', '299', '5967', 'T']

Ex Output:
d5215


Ex Input:
1, 2, ['S', 'm', 'j', '6193', '79', '9401', '2469', '7919', '9563', 'l', 'm', 'A', '983', 'M', '6661']

Ex Output:
mS


Ex Input:
19, 19, ['7475', '5517', '3651', 'w', 'i', '4985', 'x', 'X', '9525', '3873', 'f', '1715', '7551', 'L', '5047', 'e', '2543', 'R', 'h', 'l', '5715', '4425', '8277', '8725', 'k']

Ex Output:

h