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: 6, 18, ['P', 'c', '6385', '5543', 'f', 'N', '4169', '7465', '4861', 'z', 'f', 'O', 'Y', '6091', '2711', 'R', '7771', '7005']

70057771R27116091YOfz486174654169N