Definition: In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.
Input: 20, 27, ['C', 'U', 'i', 'M', 'V', 's', '6155', 'G', '2435', '8379', 'o', 'U', '6151', '3815', 'y', '9943', 'd', '1155', 'c', '5483', '5045', '295', 'Q', 'k', '1393', 'S', '7235', 'l']

7235S1393kQ29550455483