# 39: Jewels and stones

Given two strings: `jewels`

and `stones`

. Each character in `jewels`

it's a unique type of jewels. `stones`

are the stones what you have. Find out how many of your `stones`

are `jewels`

`Example 1`

```
Input: jewels = "aBb", stones = "cBbbA"
Output: 3
```

`Example 2`

```
Input: jewels = "abc", stones = "ABC"
Output: 0
```