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: 3, 21, ['V', '3661', '3743', 'Y', '3179', 'b', '7097', '3031', '5859', '4095', 'D', 'J', '2337', '4259', '2539', 'I', '9659', 'U', 'G', 'Q', '3145', '177', '9839', 'f']

Output: 5413QGU9569I935295247332JD5904958513037907b9713Y3473


Input: Consider Input: 13, 15, ['I', 'y', '3037', 'i', 'I', 'x', 'r', 'i', 'g', '1141', 'z', '8639', 'v', 'p', '7901', 'A', 'e', '7599']

Output: 1097pv


Input: Consider Input: 5, 17, ['2859', 'i', 't', 'D', 'b', '7459', 'P', '8663', '4659', 'r', 'j', '7353', '5419', '235', '7507', 'f', '3487', 'X', 'T']


Output: 7843f705753291453537jr95643668P9547b