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

public class Main {
	public static void main(String[] args) {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    
		String str = "";
		try {
			int i = 0;
			while ((str = in.readLine()) != null) {
				if (str.equals("0")) break;
				
				i++;
				System.out.println("Case " + i + ": " + str);
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
} 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) {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    
		String str = "";
		try {
			int i = 0;
			while ((str = in.readLine()) != null) {
				if (str.equals("0")) break;
				
				i++;
				System.out.println("Case " + i + ": " + str);
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
} Main public static void main(String[] args) {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    
		String str = "";
		try {
			int i = 0;
			while ((str = in.readLine()) != null) {
				if (str.equals("0")) break;
				
				i++;
				System.out.println("Case " + i + ": " + str);
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	} main {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    
		String str = "";
		try {
			int i = 0;
			while ((str = in.readLine()) != null) {
				if (str.equals("0")) break;
				
				i++;
				System.out.println("Case " + i + ": " + str);
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	} BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); in new BufferedReader(new InputStreamReader(System.in)) String str = ""; str "" try {
			int i = 0;
			while ((str = in.readLine()) != null) {
				if (str.equals("0")) break;
				
				i++;
				System.out.println("Case " + i + ": " + str);
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} NumberFormatException e {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} e.printStackTrace() e.printStackTrace e catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} IOException e {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} e.printStackTrace() e.printStackTrace e {
			int i = 0;
			while ((str = in.readLine()) != null) {
				if (str.equals("0")) break;
				
				i++;
				System.out.println("Case " + i + ": " + str);
			}
		} int i = 0; i 0 while ((str = in.readLine()) != null) {
				if (str.equals("0")) break;
				
				i++;
				System.out.println("Case " + i + ": " + str);
			} (str = in.readLine()) != null (str = in.readLine()) str in.readLine() in.readLine in null {
				if (str.equals("0")) break;
				
				i++;
				System.out.println("Case " + i + ": " + str);
			} if (str.equals("0")) break; str.equals("0") str.equals str "0" break; i++ i System.out.println("Case " + i + ": " + str) System.out.println System.out System System.out "Case " + i + ": " + str ": " "Case " + i + ": " + str "Case " i ": " str String[] args args public class Main {
	public static void main(String[] args) {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    
		String str = "";
		try {
			int i = 0;
			while ((str = in.readLine()) != null) {
				if (str.equals("0")) break;
				
				i++;
				System.out.println("Case " + i + ": " + str);
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
} public class Main {
	public static void main(String[] args) {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    
		String str = "";
		try {
			int i = 0;
			while ((str = in.readLine()) != null) {
				if (str.equals("0")) break;
				
				i++;
				System.out.println("Case " + i + ": " + str);
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    
		String str = "";
		try {
			int i = 0;
			while ((str = in.readLine()) != null) {
				if (str.equals("0")) break;
				
				i++;
				System.out.println("Case " + i + ": " + str);
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}