import math
def BMI_FUNCTION():
    height = float(raw_input("What is your height in meters? "))
    weight = float(raw_input("What is your weight in kilograms? "))
    bmi = weight / height**2
    print
    print "Your height is %r meters." % height
    print "Your weight is %r kilograms." % weight
    print
    print "Your BMI is %r" % bmi
    print "BMI Category:",
    if bmi<15.0:
        print "Very severely underweight"
    elif 15.0<=bmi<=16:
        print "Severely underweight"
    elif 16.1<=bmi<=18.4:
        print "Underweight"
    elif 18.5<=bmi<=24.9:
        print "Normal Weight"
    elif 25.0<=bmi<=29.9:
        print "Overweight"
    elif 30<=bmi<=34.9:
        print "Moderately Obese"
    elif 35<=bmi<=39.9:
        print "Severely Obese"
    elif bmi>=40:
        print "Very severely (or morbidly) obese"
    print
    choice = raw_input("Do you want to use the BMI Calculator again? 'Yes' or 'No'? ")
    while choice == 'No':
        print "Thank you for using our BMI Calculator."
        break
    while choice == 'Yes':
        BMI_FUNCTION()
        break

BMI_FUNCTION()