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:
13, 17, ['k', 'f', 'C', '1551', 'Y', '2149', 'r', 'R', '5875', 'C', 'Y', '2145', 'O', 'b', 'M', 'y', '7407', 'X', '1227', 'F', 'n']

Ex Output:
7047yMbO


Ex Input:
6, 8, ['9235', 'i', '7861', 'M', '1791', 'K', 'H', '841']

Ex Output:

148HK