"""Exercise 18.1.1 — Rectangle perimeter

Chapter 18: Bugs — Everyday Programming

This program should print the perimeter of a rectangle that is 8 metres
by 5 metres.

This program contains exactly one bug. Solution: sol_18_1_1.py
"""

def perimeter(length, width)
    return 2 * (length + width)

print(perimeter(8, 5))   # expected: 26