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.

Input: Consider Input: 5, 7, ['N', 'U', 'L', '1205', '7327', 'b', 'c']

Output: cb7237


Input: Consider Input: 2, 2, ['799', '3533', '7841']

Output: 3353


Input: Consider Input: 5, 9, ['B', '83', 'K', '8469', '8021', '1561', '6317', '6317', '6369', 'k', '5559', 'N', 'U', '1311', 'o', 'b', '2591', '2715', 'z', 'C', '1293', 'R']


Output: 96367136713616511208