from datetime import datetime


def get_input() -> str:
    input_value = input('Datum: ')
    if input_value == 'x':
        exit()

    return input_value


if __name__ == '__main__':
    while True:
        try:
            value1 = datetime.strptime(get_input(), '%d.%m.%Y')
            value2 = datetime.strptime(get_input(), '%d.%m.%Y')
            print(f'Die Differenz aus {value2} und {value2} ist {abs((value1 - value2).days)}')
        except Exception as e:
            print(f'Ungültige Eingabe! {e}')