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 Haskell (GHC 7.10.3) (judge verdict: Accepted)

import           Data.Time.Calendar (Day, fromGregorian)

main :: IO ()
main = print . solve . parse =<< getLine

data Result = Heisei | TBD deriving Show

solve :: Day -> Result
solve d = if d <= lastOfHeisei then Heisei else TBD
  where
    lastOfHeisei = fromGregorian 2019 4 30

parse :: String -> Day
parse [y1, y2, y3, y4, '/', m1, m2, '/', d1, d2] =
  fromGregorian (read [y1, y2, y3, y4]) (read [m1, m2]) (read [d1, d2])
parse _ = error "unknown format"