import java.io.*;

public 
class Main
{
   public static void main(String args[])
   {
      int a, b;
      Reader r = new BufferedReader(new InputStreamReader(System.in));
      StreamTokenizer inp = new StreamTokenizer(r);
      
      try{
      System.out.println("Podaj liczb a:");
      while(inp.nextToken() != StreamTokenizer.TT_NUMBER){
         System.out.println("Nie podae poprawnej liczby\nPodaj liczb a:");
      }
      a = (int) inp.nval;
      
      System.out.println("Podaj liczb b:");
      while(inp.nextToken() != StreamTokenizer.TT_NUMBER){
         System.out.println("Nie podae poprawnej liczby\nPodaj liczb b:");
      }
      b = (int) inp.nval;

      System.out.println("Podales a = " + a + " b = " + b);
      }
      catch (IOException e){
         System.out.println("Blad odczytu!");
      }
   }
}
