# Alphametics

Write a function to solve alphametics puzzles.

[Alphametics](https://en.wikipedia.org/wiki/Alphametics) is a puzzle where
letters in words are replaced with numbers.

For example `SEND + MORE = MONEY`:

```text
  S E N D
  M O R E +
-----------
M O N E Y
```

Replacing these with valid numbers gives:

```text
  9 5 6 7
  1 0 8 5 +
-----------
1 0 6 5 2
```

This is correct because every letter is replaced by a different number and the
words, translated into numbers, then make a valid sum.

Each letter must represent a different digit, and the leading digit of
a multi-digit number must not be zero.

Write a function to solve alphametics puzzles.

## Rust Installation

Refer to the [exercism help page][help-page] for Rust installation and learning
resources.

## Writing the Code

Execute the tests with:

```bash
$ cargo test
```

All but the first test have been ignored.  After you get the first test to
pass, remove the ignore flag (`#[ignore]`) from the next test and get the tests
to pass again.  The test file is located in the `tests` directory.   You can
also remove the ignore flag from all the tests to get them to run all at once
if you wish.

Make sure to read the [Modules](https://doc.rust-lang.org/book/second-edition/ch07-00-modules.html) chapter if you
haven't already, it will help you with organizing your files.

## Feedback, Issues, Pull Requests

The [exercism/rust](https://github.com/exercism/rust) repository on GitHub is the home for all of the Rust exercises. If you have feedback about an exercise, or want to help implement new exercises, head over there and create an issue. Members of the [rust track team](https://github.com/orgs/exercism/teams/rust) are happy to help!

If you want to know more about Exercism, take a look at the [contribution guide](https://github.com/exercism/docs/blob/master/contributing-to-language-tracks/README.md).

[help-page]: http://exercism.io/languages/rust
[modules]: https://doc.rust-lang.org/book/second-edition/ch07-00-modules.html
[cargo]: https://doc.rust-lang.org/book/second-edition/ch14-00-more-about-cargo.html


## Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.