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, ['2725', '1489', 'P', '2021', 'c', '1605', 'R', 'T', 'p', 'q', '6487', '3395', 'u', 'x']

Output: R5061c


Input: Consider Input: 4, 4, ['I', 'i', 'b', '2703']

Output: 3072


Input: Consider Input: 4, 5, ['o', '2757', '2287', 'c', 'k', 'l', 'h', '283', '5541', 'X', '6303', 'U', '1935']


Output: kc