# define Python user-defined exceptions
class MyError(Exception):
    """Base class for other exceptions"""
    pass


class KeyNoExist(MyError):
    """Raised when the input value is too small"""
    pass


class ValueNoExist(MyError):
    pass


def diction(slownik):
    for key in slownik:
        if (slownik[key] == podaj):
            print(key)
            return True
        elif (key == podaj):
            print(slownik[podaj])
            return True

    return False


def rekurencja(slownik):
    start = 0
    while start < 3:
        if diction(slownik):
            return True
        else:
            diction(slownik)
            start += 1
    return False

if not rekurencja(d):
    raise KeyNoExist


d = dict(weather="clima", earth="terra", rain="chuva")
podaj = input("Podaj słowo: ").lower()

if diction(d):
    print("Congratulations! You guessed it correctly.")
else:
    print("That english word doesn't exist in our dictionary!")
    raise KeyNoExist