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: 15, 23, ['9897', '6143', '3209', '673', 'C', '9797', 'a', 'i', '5865', '7797', 'P', 'w', 'f', 'Y', '3211', 'Z', 'j', '5605', '945', '3061', 'L', 'U', 'W', 'm']

WUL30619455605jZ3211