print("what is your father's name?")
fathers_name=raw_input()
print("how old is your father?")
father_age=input("my fathers age is: ")
print("what is your mother's name?")
mothers_name=raw_input()
print("how old is your mother?")
mother_age=input("my mothers age is: ")
combined_age=father_age+mother_age
age_difference=father_age-mother_age
print("the sum of my parents age is %s ") % combined_age
print ("my parents age difference is %s ") % age_difference