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: 2, 16, ['155', 'X', 'M', 'N', '7517', 'q', 'z', 's', '499', '5423', 'j', 'B', 'O', '7427', 'x', 'p', 'X', 'N', 'z', '9621', '1823', '1317', 't', 'i', 'e', 'L']

px7427OBj5423499szq7517NMX