Task: Program Execution
Input (English): 4, ['4487', '9093', '8039', '9991', 'h', '3563', 'W', '6105', 'x', '8065', 's', 'b', '9753', '3683', 'c', 'c', 'n', 'd']
Output (English): 4487, 9093, 8039, 9991