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

public class Main {
	public static void main(String[] args) {

		Scanner scanner = new Scanner(System.in);

		ArrayList<Integer> list = new ArrayList<Integer>();

		boolean  flg = true;

		while (flg) {
	        list.add(Integer.valueOf(scanner.nextInt()));
	        for(int i=0; i<list.size(); i++){
	        	if(list.get(i) == 0){
	        		list.remove(i);
	        		flg = false;
	        		break;
	        	}
	        }
		}

		//Case 1: 3
		for(int i=0; i<list.size(); i++){
			System.out.println("Case " + (i+1) + ": " + list.get(i));
		}

	}
}
/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