import Numeric (showIntAtBase)
import Data.Char (intToDigit)
main :: IO ()
main = getLine >>= putStrLn . retranslate . toTwoBase . goTwo . toTenBase . translate . check

check :: String -> String
check ('h':'a':'m':'u':x) = ('h':'a':'m':'u':x)
check "ham" = "ham"
check _ = error "Not a number"

translate :: String -> [Int]
translate [] = []
translate ('h':'a':'m':'u':x) = 1 : (translate x)
translate ('h':'a':'m':x) = 0 : (translate x)

multiply :: Int -> Int -> Int
multiply a b = a * 2 + b

toTenBase :: [Int] -> Int
toTenBase = foldl (multiply) 0

goTwo :: Int -> Int
goTwo x = 2 * x

toTwoBase :: Int -> String
toTwoBase x = (showIntAtBase 2 intToDigit x "") ++ ""

retranslate :: [Char] -> String
retranslate x =  concat [if x == '1' then "hamu" else "ham" | x <- x ]