def get_workout(day):
    if (day == 'Monday'):
        return 'Chest+biceps'
    elif (day == 'Tuesday'):
        return 'Back+triceps'
    elif (day == 'Wednesday'):
        return 'Core'
    elif (day == 'Thursday'):
        return 'Legs'
    elif (day == 'Friday'):
        return 'Shoulders'
    elif (day in ('Saturday', 'Sunday')):
        return 'Rest'
    raise ValueError('Not a day')
def get_workout(day):
    if (day == 'Monday'):
        return 'Chest+biceps'
    elif (day == 'Tuesday'):
        return 'Back+triceps'
    elif (day == 'Wednesday'):
        return 'Core'
    elif (day == 'Thursday'):
        return 'Legs'
    elif (day == 'Friday'):
        return 'Shoulders'
    elif (day in ('Saturday', 'Sunday')):
        return 'Rest'
    raise ValueError('Not a day')