solve :: Int -> Int
solve 1  = 7
solve 2  = 8
solve 3  = 9
solve 4  = 4
solve 5  = 5
solve 6  = 6
solve 7  = 1
solve 8  = 2
solve 9  = 3
solve 10 = 0
solve _  = -1



main :: IO ()
main = do
  n <- readLn :: IO Int
  print $ solve n