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: 21, 21, ['j', '6301', 's', 'a', '263', 's', 'f', 'f', 'O', '5057', '6129', '8003', 'S', 'Z', '1071', '6493', 'm', 'S', '6247', 'm', 'e', 'g', '2313']

e