Problem:
Score : 100 points

Problem Statement

You are given a string S as input. This represents a valid date in the year 2019 in the yyyy/mm/dd format. (For example, April 30, 2019 is represented as 2019/04/30.)

Write a program that prints Heisei if the date represented by S is not later than April 30, 2019, and prints TBD otherwise.

Constraints

S is a string that represents a valid date in the year 2019 in the yyyy/mm/dd format.

Input

Input is given from Standard Input in the following format:

S

Output

Print Heisei if the date represented by S is not later than April 30, 2019, and print TBD otherwise.

Sample Input 1

2019/04/30

Sample Output 1

Heisei

Sample Input 2

2019/11/01

Sample Output 2

TBD

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;

namespace Atcoder
{
    class Program
    {
        static void Main(string[] args)
        {
            //var input = Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray();
            var input = Console.ReadLine().ToCharArray();
            var year = new char[] { input[0], input[1], input[2], input[3] };
            var mon = new char[] { input[5], input[6] };
            var day = new char[] { input[8], input[9] };
            string y = string.Join("", year);
            string m = string.Join("", mon);
            string d = string.Join("", day);
            int y_int = int.Parse(y);
            int m_int = int.Parse(m);
            int d_int = int.Parse(d);

            if (y_int >= 2019)
            {
                if (m_int >= 5)
                {
                    Console.WriteLine("TBD");
                }
                else
                {
                    Console.WriteLine("Heisei");
                }
            }
            else
            {
                Console.WriteLine("Heisei");
            }
        }
    }
}