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:
2, 13, ['o', 'B', '5117', 'h', '3007', '2037', 'j', '2651', 'b', 'b', '8977', 'v', 'U', 'l', '3949', 'e', 'x', '6539', '3663', '1359', '2851']

Ex Output:
Uv7798bb1562j73027003h7115B


Ex Input:
2, 4, ['B', '5601', 'v', '7431', 'z']

Ex Output:
1347v1065


Ex Input:
5, 10, ['i', '7751', 'Q', '5207', 'K', '6135', 'e', 'A', '3973', '5685', '8229', '2705', 'i', '4355', 'r', '5255', '2783', 'k', 'J', 'p', '9907', 'p', '9809', 'x', '9975', 'i', '4769']

Ex Output:

58653793Ae5316K