# 22. Generate Parentheses

Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses.

- Example 1:

```
Input: n = 3
Output: ["((()))","(()())","(())()","()(())","()()()"]
```

- Example 2:

```
Input: n = 1
Output: ["()"]
```

## Constraints:

```
1 <= n <= 8
```