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: 16, 19, ['E', 'w', '963', 'X', '1651', 'K', '6393', 't', '4719', 'M', 'U', '1723', 'O', 'r', '7361', '5821', 'a', '5865', 'M', 'A', '4699', 'x', '2115', 'Z', '1263', '6215']

M5865a5821