import Prelude hiding (fromInteger, toInteger, pred)

{- Exercise 5.1 -}

-- 5.1.1
samePrefix :: String -> String
samePrefix input = undefined

-- 5.1.2
dropSamePrefix :: String -> String
dropSamePrefix input = undefined

-- 5.1.3
reverseString :: String -> String
reverseString input = undefined

{- Exercise 5.2 -}

-- 5.2.1
fromDigit :: Integer -> Char
fromDigit d = undefined

fromInteger :: Integer -> String
fromInteger n = undefined

toDigit :: Char -> Integer
toDigit c = undefined

toInteger :: String -> Integer
toInteger n = undefined

-- 5.2.2
addDigits :: Char -> Char -> String
addDigits d e = undefined

add :: String -> String -> String
add m n = undefined

-- 5.2.3
pred :: String -> String
pred n = undefined