Task: Program Execution
Input (English): 13, 17, ['851', 'k', 'U', '4737', '9171', 'K', 'A', 'y', 'A', '2093', 'u', '5985', 'u', '5849', 'r', '9843', 'v', '6503', '7741', 'W', 't']
Output (English): v9843r5849u