#### Character Appears Even Number of Times

You are given a lowercase string as an argument. Return true if **each** character in the string is shown an even number of times, false if not.

### Requirements

- Must return either true or false

#### Example #1

```
solve("aabbccdd")
> true
```

*All characters are seen twice, an even numbered of times, so we return true.*

#### Example #2

```
solve("abcdeffgg")
> false
```

*a,b,c,d and e are seen only once, an odd numbers times, so we return false.*