import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;


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

    	try{
    		InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			int i=0;
			while(true){
				String buf = br.readLine();
				int x = Integer.parseInt(buf);
				if(x == 0) break;
				i++;
				System.out.println("Case "+i+": "+x);
    		}


    	} catch(IOException e) {
    		System.err.println(e);
		}
    }
} 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) {

    	try{
    		InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			int i=0;
			while(true){
				String buf = br.readLine();
				int x = Integer.parseInt(buf);
				if(x == 0) break;
				i++;
				System.out.println("Case "+i+": "+x);
    		}


    	} catch(IOException e) {
    		System.err.println(e);
		}
    }
} Main public static void main(String[] args) {

    	try{
    		InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			int i=0;
			while(true){
				String buf = br.readLine();
				int x = Integer.parseInt(buf);
				if(x == 0) break;
				i++;
				System.out.println("Case "+i+": "+x);
    		}


    	} catch(IOException e) {
    		System.err.println(e);
		}
    } main {

    	try{
    		InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			int i=0;
			while(true){
				String buf = br.readLine();
				int x = Integer.parseInt(buf);
				if(x == 0) break;
				i++;
				System.out.println("Case "+i+": "+x);
    		}


    	} catch(IOException e) {
    		System.err.println(e);
		}
    } try{
    		InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			int i=0;
			while(true){
				String buf = br.readLine();
				int x = Integer.parseInt(buf);
				if(x == 0) break;
				i++;
				System.out.println("Case "+i+": "+x);
    		}


    	} catch(IOException e) {
    		System.err.println(e);
		} catch(IOException e) {
    		System.err.println(e);
		} IOException e {
    		System.err.println(e);
		} System.err.println(e) System.err.println System.err System System.err e {
    		InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			int i=0;
			while(true){
				String buf = br.readLine();
				int x = Integer.parseInt(buf);
				if(x == 0) break;
				i++;
				System.out.println("Case "+i+": "+x);
    		}


    	} InputStreamReader isr = new InputStreamReader(System.in); isr new InputStreamReader(System.in) BufferedReader br = new BufferedReader(isr); br new BufferedReader(isr) int i=0; i 0 while(true){
				String buf = br.readLine();
				int x = Integer.parseInt(buf);
				if(x == 0) break;
				i++;
				System.out.println("Case "+i+": "+x);
    		} true {
				String buf = br.readLine();
				int x = Integer.parseInt(buf);
				if(x == 0) break;
				i++;
				System.out.println("Case "+i+": "+x);
    		} String buf = br.readLine(); buf br.readLine() br.readLine br int x = Integer.parseInt(buf); x Integer.parseInt(buf) Integer.parseInt Integer buf if(x == 0) break; x == 0 x 0 break; i++ i 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 public class Main {
    public static void main(String[] args) {

    	try{
    		InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			int i=0;
			while(true){
				String buf = br.readLine();
				int x = Integer.parseInt(buf);
				if(x == 0) break;
				i++;
				System.out.println("Case "+i+": "+x);
    		}


    	} catch(IOException e) {
    		System.err.println(e);
		}
    }
} public class Main {
    public static void main(String[] args) {

    	try{
    		InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			int i=0;
			while(true){
				String buf = br.readLine();
				int x = Integer.parseInt(buf);
				if(x == 0) break;
				i++;
				System.out.println("Case "+i+": "+x);
    		}


    	} catch(IOException e) {
    		System.err.println(e);
		}
    }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;


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

    	try{
    		InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			int i=0;
			while(true){
				String buf = br.readLine();
				int x = Integer.parseInt(buf);
				if(x == 0) break;
				i++;
				System.out.println("Case "+i+": "+x);
    		}


    	} catch(IOException e) {
    		System.err.println(e);
		}
    }
}