/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

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

/**
 *
 * @author PsiCat
 */
public class Main
{

    private const Integer SID_LIMIT = 10;
    private static Main _instance;

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException, Exception
    {
        _instance = new Main();
    }

    public Main() throws IOException, Exception
    {
        String commandLine = "";

        InputStreamReader converter = new InputStreamReader(System.in);
        BufferedReader in = new BufferedReader(converter);
        while (true)
        {
            commandLine = in.readLine();
            if (commandLine != null)
            {
                String studentId = commandLine;
                if (studentId.length() == SID_LIMIT)
                    validSID();
                else
                    throw new Exception("Öğrenci numarası 10 karakterden oluşmalı.");
            }
        }
    }

    private void validSID()
    {
        System.out.println("Geçerli öğrenci numarası.");
    }
}