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

public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????
		ArrayList<Integer> x = new ArrayList<Integer>();
		int tmp;
		int cnt = 0;
		Scanner sc = new Scanner(System.in);
//		sc.useDelimiter("\\r\\n");

		tmp = sc.nextInt();
		x.add(tmp);
		cnt++;

		while(tmp!=0){
			sc.hasNext();
			tmp = sc.nextInt();
			x.add(tmp);
			cnt++;
		}

		for(int i=0;i<cnt-1;i++){
			System.out.println("Case "+ (i+1) +": "+ x.get(i));
		}
		sc.close();
	}

}
/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