<s>[INST] Here is a table for a basic 4x4 crossword puzzle.
```
A | B | C | D
---------
E | F | G | H
---------
I | J | K | L
---------
M | N | O | P
```
I want you to fill the puzzle with words from a random theme. Let's say the theme is "travel". I want all the words to be at least 4 letters long and at most 6 letters long.

Here are the rules:

* All words must be at least 4 letters long and at most 6 letters long.
* All words must be horizontal or vertical, never diagonal.
* Each word must start at the beginning of a row or column.
* No word can be used more than once in the puzzle.
* The puzzle cannot have any empty spaces.

Here is an example of how the puzzle might be filled:
```
T | A | I | L
---------
E | U | R | O
---------
P | A | S | S
---------
P | O | R | T
```
This example puzzle uses the theme "travel". Can you create a new 4x4 puzzle with a "travel" theme?[/INST]