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import java.io._
import java.util._
import java.math._


class InputReader(stream: InputStream)
{
   val br : BufferedReader = new BufferedReader(new InputStreamReader(stream))
   var tokenizer : StringTokenizer = null
    
   def ns() : String = {
      while (tokenizer == null || !tokenizer.hasMoreTokens())
         tokenizer = new StringTokenizer(br.readLine())
      return tokenizer.nextToken()
   }
   def nline() : String = {
      tokenizer = null
      return br.readLine()
   }
   def close() {
      br.close()
   }
}


object Main extends App{
   val in : InputReader = new InputReader(System.in)
   val out = new PrintWriter(System.out)
   
   
   
   out.flush()
   out.close()
   in.close()
   
}