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: 3, 12, ['5623', 'l', 'y', '7067', 'g', 'A', 'A', 'V', '6863', 's', 'M', '7575', 'n', '6829', 'r', 'h', 'E', '573', '9045', '3173']

7575Ms6863VAAg7067y