Task: Program Execution
Input (English): 6, 7, ['8865', '8237', 'f', 'u', '3959', '1603', 'X', 'I', 'Q', '8641', '7029', '3099', '8143', 'W', 'Z', 's', '4381', '5739', 'K', 'E', '7831']
Output (English): 1603, X