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: 12, 12, ['W', 'U', 'q', '9393', 'x', 'G', '1041', 'd', 'y', 'B', 'b', '1641', 'U', '913', 'B', 'g', 'f', '2011', '9457', 'v', 'l', '2235', 'I', '4817', '5787']

1641