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