import java.util.*;

import java.io.*;

public class Solution {

public static void main(String[] args) {

FastReader sc = new FastReader();

int t = sc.nextInt();

int tc = t;

while(t-- !=0){

System.out.print("Case #"+(tc-t)+": ");

System.out.println();

}

}

static class FastReader {

BufferedReader br;

StringTokenizer st;

public FastReader()

{

br = new BufferedReader(

new InputStreamReader(System.in));

}

String next()

{

while (st == null || !st.hasMoreElements()) {

try {

st = new StringTokenizer(br.readLine());

}

catch (IOException e) {

e.printStackTrace();

}

}

return st.nextToken();

}

int nextInt() { return Integer.parseInt(next()); }

long nextLong() { return Long.parseLong(next()); }

double nextDouble()

{

return Double.parseDouble(next());

}

String nextLine()

{

String str = "";

try {

str = br.readLine();

}

catch (IOException e) {

e.printStackTrace();

}

return str;

}

}

}