import java.util.*;
class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = 1;
		int x = 1;
		while(n != 0){
			n = sc.nextInt();
			if(n != 0){
				System.out.println("Case " + x + ": " + n);
				x += 1;
			}
		}
	}
} import java.util.*; util.* java class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = 1;
		int x = 1;
		while(n != 0){
			n = sc.nextInt();
			if(n != 0){
				System.out.println("Case " + x + ": " + n);
				x += 1;
			}
		}
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = 1;
		int x = 1;
		while(n != 0){
			n = sc.nextInt();
			if(n != 0){
				System.out.println("Case " + x + ": " + n);
				x += 1;
			}
		}
	} main {
		Scanner sc = new Scanner(System.in);
		int n = 1;
		int x = 1;
		while(n != 0){
			n = sc.nextInt();
			if(n != 0){
				System.out.println("Case " + x + ": " + n);
				x += 1;
			}
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = 1; n 1 int x = 1; x 1 while(n != 0){
			n = sc.nextInt();
			if(n != 0){
				System.out.println("Case " + x + ": " + n);
				x += 1;
			}
		} n != 0 n 0 {
			n = sc.nextInt();
			if(n != 0){
				System.out.println("Case " + x + ": " + n);
				x += 1;
			}
		} n = sc.nextInt() n sc.nextInt() sc.nextInt sc if(n != 0){
				System.out.println("Case " + x + ": " + n);
				x += 1;
			} n != 0 n 0 {
				System.out.println("Case " + x + ": " + n);
				x += 1;
			} System.out.println("Case " + x + ": " + n) System.out.println System.out System System.out "Case " + x + ": " + n ": " "Case " + x + ": " + n "Case " x ": " n x += 1 x 1 String[] args args
import java.util.*;
class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = 1;
		int x = 1;
		while(n != 0){
			n = sc.nextInt();
			if(n != 0){
				System.out.println("Case " + x + ": " + n);
				x += 1;
			}
		}
	}
}