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: 3, 20, ['c', '7091', 'u', '5461', '9969', '5867', '3287', '505', '1965', '2945', '4363', '2039', '717', 'o', '9217', 'N', 'p', 'h', 'B', '9709', 'J']

9709BhpN9217o71720394363294519655053287586799695461u