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: 1, 19, ['U', '967', 'F', '6911', '7979', '3799', '5993', 'y', '2421', 'X', 'B', '3241', 'f', '3519', '3307', 'U', 'f', '2801', '9103', '4673', 'Y', '5027', '943']

91032801fU33073519f3241BX2421y5993379979796911F967U