#!/usr/local/bin/python3

class Person:
    def __init__(self, weight, height):
        self.weight = weight
        self.height = height
    def bmi(self):
        return BMI(self.weight, self.height)

class BMI:
    def __init__(self, weight, height):
        h = height / 100
        self.value = weight / (h**2)
    def describe(self):
        bmi = self.value
        print('---')
        print('BMI =', bmi)
        if bmi < 18.5:
            print('slender')
        elif bmi < 25.0:
            print('normal')
        elif bmi < 30.0:
            print('slightly fat')
        elif bmi < 35.0:
            print('very fat')
        else:
            print('very very fat')

person = Person(65, 170)
print(person)
bmi = person.bmi().value
print(bmi)
person.bmi().describe()