# caesar2.py - Decrypt the Caesar cipher.  Assume the key is 3.
# This program is analogous to original caesar.py.

inFile = open("cipher.txt", "r")
outFile = open("plain2.txt", "w")

text = inFile.read()

# Loop to modify each character one by one.
for i in range(0, len(text)):
    c = chr(bytearray(text)[i]-3)
    outFile.write(c)

# Finally, tell Python we are done with the files.
inFile.close()
outFile.close()