Task: Program Execution
Input (English): 1, 3, ['669', '3561', '3989', '6343', '1819', '1139', '6861', 'b', 'M', '6061', '6291', 'z', 'l', '4523', 'I', '3013', '9473', 'N', 'M', 'C', 'N', 'u']
Output (English): 3989, 3561, 669