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: Wrong Answer)

main = do
    s <- getLine
    putStrLn $ if isHeisei s then "heisei" else "TBD"

isHeisei :: String -> Bool
isHeisei s
    | y < 2019 = True
    | y > 2019 = False
    | y == 2019 = case () of
       () | m < 4 -> True
       () | m > 4 -> False
       () | m == 4 -> d <= 30
    where 
        y = read $ take 4 s
        m = read $ take 2 $ drop 5 s
        d = read $ drop 8 s