PYTHON: I am writing a script asking the user what year they were born, I also have to calculate the age, and print "You still have .....years to retire." which retirement year is 70 years old.

born = int(input("When were you born? "))
age = 2019 - born
print("You still have " + str(70 - age) + " years to retire.")
PYTHON: I am writing a script asking the user what year they were born, I also...