/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		int shestnadzat = 16;
		int desyat = perevesti16v10(shestnadzat);
		System.out.println(desyat);
		int obratno = iObratno(desyat);
		System.out.println(obratno);
	}
	
	static int perevesti16v10(int n) {
		if (n != 16) {
			throw new IllegalArgumentException();
		}
		return 10;
	}
	
	static int iObratno(int n) {
		if (n != 10) {
			throw new IllegalArgumentException();
		}
		return 16;
	}
}