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: 4, 18, ['g', '3947', 'z', 'n', 'W', '8501', '9869', '4273', '9439', '5445', 'u', '9033', '1749', 'g', 'x', 'w', 's', '6039', '8493', 'l', 'f', '5519', '2145', '3647', '8413', '2865', '8937', '2701']
Example Output: 6039swxg17499033u54459439427398698501Wn

Example Input: 1, 8, ['g', '6673', '761', 'B', '9393', '5409', 'A', '245', '4053']
Example Output: 245A54099393B7616673g

Example Input: 1, 20, ['E', '1927', '5221', '5019', 'R', 'B', 'X', 'm', '67', '9005', '6591', '1251', '2221', '2157', 'C', 'O', '7653', '3821', 'z', '1613', '9701', 'o', 'q', '8645', 'C']
Example Output:
1613z38217653OC2157222112516591900567mXBR501952211927E