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: 1, 1, ['C', '6223']

Output: C


Input: Consider Input: 30, 30, ['t', 'W', 'P', '7193', '913', 'j', 'Y', '9535', '7771', 'R', '9275', '7115', '3433', '5279', 'T', '8899', '9497', 'U', '3461', '1753', 'k', 'T', '7899', '6963', '9271', '9173', '3357', '3521', '7397', 'r']

Output: r


Input: Consider Input: 1, 3, ['g', '957', '5517', 'R', 'b']


Output: 7155759g