
import java.util.Scanner;

public class Main {
	void testcase(){
		Scanner s = new Scanner(System.in);
		int tmp;
		int cnt = 1;
		tmp = s.nextInt();
		while(tmp != 0){
			System.out.println("Case " + cnt + ": " + tmp);
			tmp = s.nextInt();
			cnt++;
		}
	}
	public static void main(String args[]){
		Main m = new Main();
		m.testcase();
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz