	import java.util.Scanner;

public class Main {
	 
	    public static void main(String[] args){
	        Scanner scan = new Scanner(System.in);
	        int i = 1;
	        while (true){   
	            int a = scan.nextInt();
	            if(a == 0){
	                break;
	            }else{
	                System.out.println("Case"+" "+i+":"+" "+a);
	                i= 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