A quick question

[James]

Hey everyone,

I just started using python and cant figure this out, I'm trying to 
make a program where someone types in a word and the program gives it 
back backwards.  For example if the person puts in "cat" I want the 
program to give it back as "tac" and what it does is prints out 3,2,1.  
How can I get these integers to print as letters?  This is what I have,

word = raw_input("Type a word:")
start = len(word)

for letter in range(start, 0, -1):
    print letter