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: 7, 13, ['s', 'f', 'h', 'U', 'x', '2431', 'F', '4521', '1309', 'y', 'I', '1915', '2761', 'b', '3835', 'O', 'X', 'D', 'L', 'T', 'i', '53']

27611915Iy13094521F