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: 6, 21, ['C', 'W', '8929', 'W', '5819', 'h', 'w', '5159', '8223', '9531', '2473', '2355', '3589', 'e', '323', 'P', 'D', 'k', 'N', 'h', 'o', '8801', 'o', 'K', 'A']

ohNkDP323e358923552473953182235159wh