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, 12, ['131', 'A', 'C', 'l', '2139', '875', '3869', 'Z', '6487', '813', '5873', '2335', '4495', '1351', '5401', '689', '6077', '1427', 'F']

233558738136487Z3869