
import java.util.Scanner;
import java.util.ArrayList;

public class Main {
	public static void main(String[] args) {
		int x, i = 0, j;
		ArrayList<Integer> t = new ArrayList<Integer>();
		Scanner sc = new Scanner(System.in);
		while(i < 10000){
			x = sc.nextInt();
			if(x == 0)
				break;
			t.add(new Integer(x));
			i++;
		}
		j = i;
		for(i = 1; i - 1 != j; i++){
			System.out.println("Case " + i + ":" + " " + t.get(new Integer(i - 1)));
		}
		
	}
}
/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