Task: Program Execution
Input (English): 15, 17, ['W', '6609', '3649', '4201', 'S', '1635', 'C', 'P', 'H', 'q', '8271', '8405', '4919', 'C', '4855', 'd', 'w', 'h', 'X', 's', '6051', 't']
Output (English): 4855