##############################################################################
# Python From Scratch
# Author: Nilo Ney Coutinho Menezes
# Editora Novatec (c) 2010-2025 - LogiKraft 2025
# Site: https://pythonfromscratch.com
# ISBN: 978-85-7522-949-1 (Paperback), 978-85-7522-950-7 (hardcover), 978-85-7522-951-4 (ebook)
#
# File: chapter 04/exercise-04-14.py.py
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a = int(input("a: "))
if a < 10:
    print("a is less than 10")
elif a < 20:
    print("a is greater than or equal to 10 and less than 20")
else:
    print("a is greater than or equal to 20")