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: 6, 15, ['G', 'W', 's', '5559', '6817', 'M', 'E', '1839', '3123', '2881', '7411', '6275', 'R', 'w', 'Q']

QwR62757411288131231839EM