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, 19, ['5321', '7787', '591', '4735', 'V', 'c', '7317', 'P', '4685', '387', '3589', 'H', '1677', 'B', '5697', '343', '6197', 'u', '4531']

4531u61973435697B1677H35893874685P7317cV47355917787