#!/usr/bin/env python

Cdegrees = [-20, -15, -10, -5, 0, 5, 10, 15, 20, 25, 30, 35, 40]
print ('    C     F')
i=0
while i<len(Cdegrees):
    F = (9.0/5)*Cdegrees[i] + 32
    print("%5d %5.1f"  % (Cdegrees[i],F))
    i+=1
