import java.io.PrintStream;
import java.util.List;
import java.util.ArrayList;
import java.util.Random;

public class CoinFlip
{
   public static void main(String[] args)
   {
      PrintStream output = System.out;
      
      final int M = 100000;
      final int N = 20;
      
      List<Integer> heads = new ArrayList<Integer>();
      for (int i = 0; i <= N; i++)
      {
         heads.add(0);
      }
      
      Random rng = new Random();
      for (int trial = 0; trial < M; trial++)
      {
         int count = 0;
         for (int flip = 0; flip < N; flip++)
         {
            if (rng.nextBoolean())
            {
               count++;
            }
         }
         int index = count;
         int oldCount = heads.get(index);
         heads.set(index, oldCount + 1);
      }
      
      for (int i = 0; i <= N; i++)
      {
         int count = heads.get(i) / 1000;   /* NOTE: the 1000 is for
                                               scaling purposes */
         output.printf("%2d", i);
         if (count > 0)
         {
            String format = "%" + count + "s";
            output.printf(format, "*");
         }
         output.println();
      }
   }
}