import java.io.*;
import java.util.*;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class Solution {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String output="";
        Pattern c_pattern = Pattern.compile("#include<stdio.h>");
        Pattern java_pattern = Pattern.compile("import java");
        Pattern python_pattern = Pattern.compile("(^print|def )");
        while(scanner.hasNextLine()){
            String line = scanner.nextLine();
            if (c_pattern.matcher(line).find()) output="C";
            else  if (java_pattern.matcher(line).find()) output="Java";
            else  if (python_pattern.matcher(line).find()) output="Python";
            if(!output.equals(""))  break;
        }
        System.out.println(output);
    }
}

import re
import sys

content = sys.stdin.read()

if re.match(r'.*?class [^{]+{', content, re.DOTALL):
    print('Java')
elif re.match(r'.*?#include<', content, re.DOTALL):
    print('C')
else:
    print('Python')

import re
import sys

code = sys.stdin.read()

if re.search("#include<stdio.h>", code) is not None:
    print("C")
elif re.search("import java.io", code) is not None:
    print("Java")
else:
    print("Python")

import re
import sys
string = sys.stdin.read()
if bool(re.findall(r'\bdef\b|[^\.]print\b', string)):
    print("Python")
elif bool(re.findall(r"\bpublic\s+class\b|\bpublic\s+static\s+void\s+main\b|\bSystem\.out\.println\b", string)):
    print('Java')
elif bool(re.findall(r'\b#include\b|\bint\s+main\b|\bprintf\b', string)):
    print('C')

import sys
m=sys.stdin.read()
if "#include" in m:
    print("C")
elif "java" in m:
    print("Java")
else:
    print("Python")