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: 12, 25, ['J', '7271', '7735', '3431', 'f', 'b', '4607', 'B', 'W', '3931', '5743', '5111', 'K', '575', '9739', 'W', 'h', '8071', '6473', '3229', '7305', 'K', 'X', 'F', '2515']

2515FXK7305322964738071hW9739575K5111