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: 2, 18, ['p', '5247', 'P', '2023', 'b', '3101', 'x', '1251', 'p', 'C', 'M', 'u', 'U', '6735', 'Y', 'B', 'q', 'C', '479', 'r', 'o', 'B', 'W', '6665', 'p']

CqBY6735UuMCp1251x3101b2023P5247