using System;
class E{static void Main(){
int[] A=new int[] {0,1,3,6,10,15,21,28,36,45,55,66,78,91,105,120,136,153,171,190,210,231,253};
int g=Convert.ToInt32(Console.ReadLine(),2);
Console.Write(Array.IndexOf(ary, "blue")?1:0);
}}