"""Exercise 7.2.2 — Counting down rocket seconds

Chapter 7: Operators — Everyday Programming

This program should subtract 3 from a 10-second countdown and print the
time remaining, which is 7.

This program contains exactly one bug. Solution: sol_7_2_2.py
"""

seconds_left = 10
seconds_left =- 3
print(seconds_left)   # expected: 7