/**************************************************************************************************** 
To boithitiko programma kataskeyastike gia na mas boithisei stin eisagogi stoixeion apo pliktrologio
Apla prepei na to topothetisoume mesa ston idio fakelo me ta alla java arxeia mas kai otan theloume 
na eisagoume stoixeia apo to pliktrologio apla dinoume :

metabliti=UserInput.getInteger();
metabliti=UserInput.getFloat();
metabliti=UserInput.getDouble();
metabliti=UserInput.getShort();
metabliti=UserInput.getLong();
metabliti=UserInput.getByte();
metabliti=UserInput.getString();
metabliti=UserInput.getChar();

opou metabliti einai i metabliti stin opoia theloume na baloume timi

****************************************************************************************************/


import java.io.*;

class UserInput
{
	static int getInteger()
	{
		String line;
		InputStreamReader eisodosString=new InputStreamReader(System.in);
		BufferedReader br=new BufferedReader(eisodosString);
		try
		{
			line=br.readLine();
			int i=Integer.parseInt(line);
			return i;
		}
		catch(Exception e)
		{
			return -1;
		}
	}
	
	static float getFloat()
	{
		String line;
		InputStreamReader eisodosString=new InputStreamReader(System.in);
		BufferedReader br=new BufferedReader(eisodosString);
		try
		{
			line=br.readLine();
			float i=Float.parseFloat(line);
			return i;
		}
		catch(Exception e)
		{
			return -1;
		}
	}
	
	static double getDouble()
	{
		String line;
		InputStreamReader eisodosString=new InputStreamReader(System.in);
		BufferedReader br=new BufferedReader(eisodosString);
		try
		{
			line=br.readLine();
			double i=Double.parseDouble(line);
			return i;
		}
		catch(Exception e)
		{
			return -1;
		}
	}
	
	static short getShort()
	{
		String line;
		InputStreamReader eisodosString=new InputStreamReader(System.in);
		BufferedReader br=new BufferedReader(eisodosString);
		try
		{
			line=br.readLine();
			short i=Short.parseShort(line);
			return i;
		}
		catch(Exception e)
		{
			return -1;
		}
	}
	
	static long getLong()
	{
		String line;
		InputStreamReader eisodosString=new InputStreamReader(System.in);
		BufferedReader br=new BufferedReader(eisodosString);
		try
		{
			line=br.readLine();
			long i=Long.parseLong(line);
			return i;
		}
		catch(Exception e)
		{
			return -1;
		}
	}
	
	static byte getByte()
	{
		String line;
		InputStreamReader eisodosString=new InputStreamReader(System.in);
		BufferedReader br=new BufferedReader(eisodosString);
		try
		{
			line=br.readLine();
			byte i=Byte.parseByte(line);
			return i;
		}
		catch(Exception e)
		{
			return -1;
		}
	}
	
	static String getString()
	{
		String line;
		InputStreamReader eisodosString=new InputStreamReader(System.in);
		BufferedReader br=new BufferedReader(eisodosString);
		try
		{
			line=br.readLine();
			return line;
		}
		catch(Exception e)
		{
			return "wrong";
		}
	}
	
	static char getChar()
	{
		String line;
		InputStreamReader eisodosString=new InputStreamReader(System.in);
		BufferedReader br = new BufferedReader(eisodosString);
		try
		{
			line=br.readLine();
			char i = line.charAt(0);
			return i;
		}
		catch(Exception e)
		{
			return 'a';
		}	
	}
}