import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = "";
        int i = 1;
        while(true){
            str = br.readLine();
            if(str.equals("0")){
                break;
            }//if
            System.out.println("Case " + i + ": " + str);
            i++;
        }//while
        br.close();
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = "";
        int i = 1;
        while(true){
            str = br.readLine();
            if(str.equals("0")){
                break;
            }//if
            System.out.println("Case " + i + ": " + str);
            i++;
        }//while
        br.close();
    }
} Main public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = "";
        int i = 1;
        while(true){
            str = br.readLine();
            if(str.equals("0")){
                break;
            }//if
            System.out.println("Case " + i + ": " + str);
            i++;
        }//while
        br.close();
    } main {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = "";
        int i = 1;
        while(true){
            str = br.readLine();
            if(str.equals("0")){
                break;
            }//if
            System.out.println("Case " + i + ": " + str);
            i++;
        }//while
        br.close();
    } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String str = ""; str "" int i = 1; i 1 while(true){
            str = br.readLine();
            if(str.equals("0")){
                break;
            }//if
            System.out.println("Case " + i + ": " + str);
            i++;
        }//while true {
            str = br.readLine();
            if(str.equals("0")){
                break;
            }//if
            System.out.println("Case " + i + ": " + str);
            i++;
        } str = br.readLine() str br.readLine() br.readLine br if(str.equals("0")){
                break;
            }//if str.equals("0") str.equals str "0" {
                break;
            } break; System.out.println("Case " + i + ": " + str) System.out.println System.out System System.out "Case " + i + ": " + str ": " "Case " + i + ": " + str "Case " i ": " str i++ i br.close() br.close br String[] args args public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = "";
        int i = 1;
        while(true){
            str = br.readLine();
            if(str.equals("0")){
                break;
            }//if
            System.out.println("Case " + i + ": " + str);
            i++;
        }//while
        br.close();
    }
} public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = "";
        int i = 1;
        while(true){
            str = br.readLine();
            if(str.equals("0")){
                break;
            }//if
            System.out.println("Case " + i + ": " + str);
            i++;
        }//while
        br.close();
    }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = "";
        int i = 1;
        while(true){
            str = br.readLine();
            if(str.equals("0")){
                break;
            }//if
            System.out.println("Case " + i + ": " + str);
            i++;
        }//while
        br.close();
    }
}