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: 8, 15, ['63', '8469', '4047', 'Y', 'U', '7453', '2073', '5683', 'u', 'q', '5225', '4015', '4433', '5021', 'q', '3861', '9811', '3919', 'g', 'j', 'u', '1225', '6027', 'i']

q5021443340155225qu5683