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: 4, 4, ['w', '3895', '4989', '7875', 'u']

Output: 5787


Input: Consider Input: 3, 6, ['643', 'X', 'F', '7453', '8495', '7943']

Output: 349759483547F


Input: Consider Input: 13, 13, ['M', 'W', 'N', 'e', '2073', '3401', '7333', 'A', 'p', '2445', 'E', 'e', 'a']


Output: a