# heap-algorithm

Created by [@theoludwig](https://github.com/theoludwig) on 8 November 2021.

## Instructions

Write a program that generates all possible unique permutations of a string.

## Source

- [Heap's Algorithm - Wikipedia](https://en.wikipedia.org/wiki/Heap%27s_algorithm)

## Examples

### Example 1

#### Input

```txt
abc
```

#### Output

```txt
abc
bac
cba
bca
cab
acb
```

See the `test` folder for examples of input/output.