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: 8, 9, ['1545', '213', '2859', '7605', '4763', '2687', '8909', '1779', '1863', 'g', 'P', '381', 'E', '9857', '3839', '2723', 'u', 'x', '4153', '5649', '1769', '8085']

18631779