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: 1, 12, ['6893', 'o', '2661', 'T', 'w', 'u', 'k', '7727', 'X', '9861', '9125', 'o', 'x', '9109']

Output: o52191689X7277kuwT1662o3986


Input: Consider Input: 4, 13, ['6795', 'w', '3351', 'X', '8077', '4619', '2739', '7575', '281', 'c', '9503', '449', '2935', 'v', '6989', 'N', '2425', '5811']


Output: 53929443059c1825757937291647708X