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, 19, ['d', 'n', '2003', '5705', '901', 'H', '6985', '2245', 'k', '1473', '3271', 'q', 'k', '4295', 'v', '3357', '8605', 'L', 'L', '1247', '8027']

LL