#Exer. 4.3 in "A primer on..."

with open('fdeg0.txt','r') as infile:
    infile.readline()
    infile.readline()
    infile.readline()

    line = infile.readline()
    words = line.split()
    F = float(words[-1])

C = (F-32)*5/9
print(f'{F} degrees Fahrenheit is {C:.2f} degrees Celsius')

"""
Terminal> python f2c_file_read.py
67.2 degrees Fahrenheit is 19.56 degrees Celsius
"""