Task: Program Execution
Input (English): 16, 19, ['3143', '2135', '7223', '7841', '5399', '9495', '6721', '9691', '8159', '6365', 'J', '8467', '2397', '117', 'b', 'K', '8985', '7783', 'X', 'U', 'P']
Output (English): K89857783X