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, 9, ['W', '1701', 'c', '3565', 'W', '687', 'b', 'o', 's', '3041', '4325', 'A', '2405', '5087', 'y', 'x', '2017', 'Y', 'U']
Example Output: so

Example Input: 16, 17, ['5473', '5513', 'G', '2465', '1513', 'Z', '5341', 'X', 'R', '4355', '3215', 'W', 'k', 'C', '9845', '5377', 'c', '3169', '7049', '9795', 'R', '7301', 'C', 'm', '983', '2997', 'I']
Example Output: c5377

Example Input: 7, 12, ['2781', '6449', '2297', '2221', 'G', 'E', 'X', '8429', 'f', '3737', '7905', 'Y', 'y', 'P', '2251', '8487', 'T']
Example Output:
Y79053737f8429X