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: 17, 18, ['R', 'w', 'R', 'Q', 'S', '1877', '8243', 'v', '3099', '7267', '385', 'a', '3771', 'm', '285', 'e', 'M', '9893', 'n', '1377', 'y', '9685', '2229', '9339']

9893M