# A Little Puzzle

Open a file specified by the user. This file will contain a bunch
of characters. You should read in *each* character from the file,
one character at a time. Display every third character on the screen.
Throw the other characters away.

```eval_rst
There is a sample input file called :download:`puzzle.txt <examples/puzzle.txt>`, containing a little message you can use to test your program.
```

For fun, the "thrown-away" characters might say something, too, in
case you care to try to view them somehow.

Name your program `puzzle.py`


```eval_rst
* :download:`puzzle.txt <examples/puzzle.txt>`
```
```eval_rst
* :download:`puzzle2.txt <examples/puzzle2.txt>`
```


```
Open which file: puzzle2.txt

# The secret message should appear here...
```

Each file contains three messages. Can you display all three but use *only one* loop?

---


©2021 Daniel Gallo


This assignment is licensed under a
[Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License](https://creativecommons.org/licenses/by-nc-sa/3.0/us/deed.en_US).  

![Creative Commons License](images/by-nc-sa.png)

Adapted for Python from Graham Mitchell's [Programming By Doing](https://programmingbydoing.com/)