请以Python字典形式返回三个随机数的绝对值，并且字典的键分别为'first'、'second'和'third'。
user
```python
import random

{
    'first': abs(random.randint(-100, 100)),
    'second': abs(random.randint(-100, 100)),
    'third': abs(random.randint(-100, 100))
}
```
assistant