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: 20, 22, ['F', 'u', '5565', 'O', 'K', '3703', 'O', 'b', 'Q', '9841', '4871', 'O', 'd', 'p', '5869', '1155', '3475', '8331', 'O', '1389', '9761', '4069', '9951', 'x']

406997611389