using System;
using System.Linq;

namespace _9._ArrayValuesTimes10
{
    class Program
    {
        static void Main(string[] args)
        {
            var array = Console.ReadLine()
              .Split(',')
              .Select(int.Parse)
              .ToArray();
            var index = int.Parse(Console.ReadLine());

            Console.WriteLine(IsEqualWhenMultiplyBy10(array, index));
        }
        static string IsEqualWhenMultiplyBy10(int [] array, int index)
        {
            if (array.Length - 1 == index)
            {
                return "false";
            }
            if(array[index]*10 == array[index+1])
            {
                return "true";
            }
            return IsEqualWhenMultiplyBy10(array, index + 1);
        }
    }
}