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: 18, 20, ['S', 'g', '875', 'L', '2257', '2313', 'c', '5109', 'j', 'T', 'S', '6439', '2075', 'a', '455', '3653', 'k', 's', '3119', '3337', 'e', 'e', 's']

33373119s