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: 15, 20, ['P', 'C', '3269', '3025', 'T', 'x', 'h', '6313', '4787', 'w', '4467', 'Z', '353', 'B', '8699', '8941', '6173', 'U', '675', '6875', '8975', 'p', '1865', '7603', '6823', '7467', 'e', 'F', 'C']

6875675U617389418699