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: 9, 12, ['2157', 'm', '2829', 'A', 'h', 'S', '6905', '2513', 't', '1721', 'j', 'N', '4847', 'k', 'X', '3379', 'Y', 'T', '8341', 'M']

Nj1721t