isFifthPowerSum :: Int -> Bool
isFifthPowerSum x
    | x == 1    = False
    | x == fifthPowerSum x = True
    | otherwise = False
isFifthPowerSum :: Int -> Bool
isFifthPowerSum x
    | x == 1    = False
    | x == fifthPowerSum x = True
    | otherwise = False
isFifthPowerSum x
    | x == 1    = False
    | x == fifthPowerSum x = True
    | otherwise = False