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.

Example Input: 8, 21, ['2943', 'u', '4551', 'A', '2429', 'o', 'L', '1565', 'a', 'X', '7355', 'R', 'T', '6539', '9603', '967', 'l', '1715', '3931', '5387', '7197', '435']
Example Output: 7197538739311715l96796036539TR7355Xa1565

Example Input: 1, 3, ['2351', 'k', '2321']
Example Output: 2321k2351

Example Input: 4, 5, ['P', 'E', '9605', 'A', '6843', 'l', '8959', '5309', '1491', 'b', 'o', '1159']
Example Output:
6843A