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, 10, ['U', 'I', '3783', 'I', '2215', 'Y', '5517', 'B', '9143', 'B', '7415', 'K', '9201', '2111', '8507', '991', '9651', '7325', 'v', 'W', 's', '9705']

B9143B5517Y2215I3783IU