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, ['K', '9541', '5545', 'G', 'd', '5833', 'Z', '2725', '3153', 'R', 'Z', '4495', '8667', 'e', 'H', 'C', 'Y', 'B', 'M', 'b', '8031', '6785', 'f', '1155', '5621', 'T']

bMB