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: 15, 21, ['a', '323', '6087', 'F', 'f', 't', 'w', 'M', 'Z', 'r', '3823', 'F', '7277', '7979', '5605', 'Q', 'G', 'b', '4863', 'l', 'R', '5203', 'h', 'C', 'i', 'R', '5863', 'E', 'Q']

Rl4863bGQ5605