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: 2, 15, ['4837', 'W', 'o', '149', '9479', 'j', '2853', '6859', '139', 'P', '1817', '8897', '1051', 'm', '6011', 'D', 'Y', 'O', 'L']

6011m105188971817P13968592853j9479149oW