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: 2, 5, ['l', 'E', '729', 'U', 'z', '9729', '3247']

Output: zU927E


Input: Consider Input: 2, 5, ['Y', 'O', 'Q', 'l', 'E']

Output: ElQO


Input: Consider Input: 4, 7, ['4653', 'J', '3721', '6277', 'J', '1971', 'K', '5279', '1679']


Output: K1791J7726