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, 4, ['o', '5393', 'p', 'h', '5617', 'F', 'I', 'a']

Output: hp3935


Input: Consider Input: 3, 5, ['C', '4345', 'T', 't', 'U', 'p']

Output: UtT


Input: Consider Input: 9, 18, ['c', '7011', 'E', 'T', 'i', 'V', '8239', '9387', '6693', '4377', '9937', 'Y', '2913', '7905', 'K', 'H', 'R', '7201', '9397']


Output: 1027RHK50973192Y739977343966