public class run {
	public static void main ( String args[] ) {
		
		Robot robot = new Robot (args.length>0? args[0] : "");
		
		int white_index=0;     // white pointer
		int blue_index=0;      // blue pointer
		int red_index=robot.nbins()-1; // red pointer
		int nb_swaps=0;        // swap counter
		 
		if (red_index <= 0) {
			robot.report();
			return;
		}
		
		while (white_index <= red_index)
		{
		    switch( robot.peek(white_index) )
		     {
		      case 'w': 
		       white_index++; 
		       break;
		 
		      case 'r':
		       robot.swap(blue_index,white_index);
		       blue_index++;
		       white_index++;
		       break;
		 
		      default:
		      case 'b':
		       robot.swap(white_index,red_index);
		       red_index--;
		       break;
		     }
		}
		    
		robot.report();
	}
}