I have the following function that gets unique words from a python file:

```
def add_unique(s, word_list):
  for word in s.strip().split():
    word = word.lower()
    if word not in word_list:
        word_list.append(word)

```

and if I call it from the main function like this:

```
myFile = open("gameofthrones.txt", "r")

 words = []

for line in myFile:

  print(add_unique(line, words))

myFile.close()

print("Unique words in my file are: ")
for word in words:
   print(word)

```

This prints all of the unique words in one single column, and I was wondering how I could print all the words in the list in 3 separate columns? Thanks in advance.