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: 10, 20, ['6063', '4743', 'T', 'Y', '1661', 'N', 'C', 'Z', 'Q', '2283', 'p', '2057', 'x', 'X', 'k', 'L', '9897', '5601', '1213', '6389', 'w']

6389121356019897LkXx2057p2283