[Tutor] unknown error in simple program

[Eli Zabielski]

I am reading "Python Programming for the absolute beginner" and am on
chapter 4 challenges.
It says to create a program to let the player guess letters of the word (I
haven't tried to incorporate a guess limit yet like it says)
my program looks fine to me, but I get a fat juicy error when I run it

My program:

# Guess My Word
# Players pick letters in a random secret word
# Eli Zabielski-2/13/06
import random
print "Hello, I will give you 5 chances to guess letters of one of my secret
words.\n On the final chance, you must guess the word"
WORDS = ("python", "jumble", "difficult", "answer", "xylophone",
         "recon", "recordable")
word=random.choice(WORDS)
print "The word is", len(word), "letters long."
guess=input("guess one letter")
tried_good=()
tried_bad=()
guess_count=0
while guess not in word:
    guess_count+=1
    guess+=tried_bad
    print "Nope, try again\n"
    print "Bad tries",tried_bad
    guess=input("\nguess one letter")
    if guess_count==4:
        "You have to guess the word now"
        guess_word=input("What say you")
        guess_word=guess_word.lower()
while guess in word:
    print "Good, you got one"
    guess+=tried_good
    print "Bad tries",tried_bad
    print "Good tries", tried_good
    guess=input("\nguess one letter")
    if guess_count==4:
        "You have to guess the word now"
        guess_word=input("What say you")
        guess_word=guess_word.lower()
if guess_word==word:
    print "Good, you got it!"
elif guess_word != word:
    print "Aww, thats too bad, the word is mine forever"
exit=input("Press enter to exit.")



And I get: (No matter what letter I guess)

Traceback (most recent call last):
  File
"C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
line 310, in RunScript
    exec codeObject in __main__.__dict__
  File "C:\Documents and
Settings\Eli\Desktop\Games\Applications\Programs\Guess the word\Guess the
word 1.0.py", line 10, in ?
    guess=input("guess one letter")
  File "C:\Python24\Lib\site-packages\pythonwin\pywin\framework\app.py",
line 372, in Win32Input
    return eval(raw_input(prompt))
  File "<string>", line 0, in ?
NameError: name 'e' is not defined
>>>

I have been attempting to find the problem for 2 hours now and try to solve
it on my own, but I can't do it this time.

Thanks for the help

--
Eli Zabielski
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# Guess My Word
# Players pick letters in a random secret word
# Eli Zabielski-2/13/06
import random
print "Hello, I will give you 5 chances to guess letters of one of my secret words.\n On the final chance, you must guess the word"
WORDS = ("python", "jumble", "difficult", "answer", "xylophone",
         "recon", "recordable")
word=random.choice(WORDS)
print "The word is", len(word), "letters long."
guess=input("guess one letter")
tried_good=()
tried_bad=()
guess_count=0
while guess not in word:
    guess_count+=1
    guess+=tried_bad
    print "Nope, try again\n"
    print "Bad tries",tried_bad    
    guess=input("\nguess one letter")
    if guess_count==4:
        "You have to guess the word now"
        guess_word=input("What say you")
        guess_word=guess_word.lower()
while guess in word:
    print "Good, you got one"
    guess+=tried_good
    print "Bad tries",tried_bad
    print "Good tries", tried_good
    guess=input("\nguess one letter")
    if guess_count==4:
        "You have to guess the word now"
        guess_word=input("What say you")
        guess_word=guess_word.lower()
if guess_word==word:
    print "Good, you got it!"
elif guess_word != word:
    print "Aww, thats too bad, the word is mine forever"
exit=input("Press enter to exit.")