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, 17, ['m', 'k', '9657', '6793', 'H', 'H', 'l', 'Q', '1745', '325', '1355', '6505', 's', 'M', '6411', 'n', 'n', 'j', 'G', 'n', '8199', 'S', 'O']

nn6411Ms650513553251745QlHH67939657