Task:
Make a function that converts a word to pig latin. The rules of pig latin are:
```
If the word has more than 3 letters:
  1. Take the first letter of a word and move it to the end
  2. Add -ay to the word
Otherwise leave the word alone.
```
Example: `hello` = `ellohay`
def pig_latin(word):
    if len(word) > 3:
      ay = word[0] + "ay"
      ans = word[1:]+ay
      return ans
    else:
      return word
def pig_latin(word):
    if len(word) > 3:
      ay = word[0] + "ay"
      ans = word[1:]+ay
      return ans
    else:
      return word