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, 18, ['l', 'a', '6857', '4371', 'f', '8933', '7827', '8495', 'F', 'G', 'p', 'u', 'T', '7047', 'w', '8951', 'H', '559', '4159', 'n', '2833', 'f', '9425', '1631', '7347', '3667']

559H8951w7047Tu