We’re getting pretty close to a playable board, but wouldn’t it be nice to get rid of those quote marks and commas? We’re storing our data as a list, but the player doesn’t need to know that!

letters = ['a', 'b', 'c', 'd']
print " ".join(letters)
print "---".join(letters)

1. In the example above, we create a list called letters.
2. Then, we print a b c d. The .join method uses the string to combine the items in the list.
3. Finally, we print a---b---c---d. We are calling the .join function on the "---" string.

We want to turn each row into "O O O O O".