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: 16, 21, ['8623', 'm', 'd', 'g', 'y', '6325', 't', 'h', 'I', 'v', 'u', 'i', '3191', '3319', '3791', '7713', 'B', '1151', 'z', 'J', '9893', '6671', '227']

9893Jz1151B7713