Task: Program Execution
Input (English): 1, 10, ['U', 'I', '3783', 'I', '2215', 'Y', '5517', 'B', '9143', 'B', '7415', 'K', '9201', '2111', '8507', '991', '9651', '7325', 'v', 'W', 's', '9705']
Output (English): B9143B5517Y2215I3783IU