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: 18, 19, ['q', 'e', 'P', 'O', '2529', 'Q', '6015', 's', 'y', '3533', 'C', '2033', 'y', 'Z', 'K', '9767', 'm', 'M', 'u']

uM