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: 17, 19, ['x', 'p', '5699', '6337', 'P', 'w', 't', 'O', 'W', '7155', 'h', '8383', '2647', '81', 'U', 'k', '1521', '1705', 'a']

a17051521