Digit Dilemma

```python
def sat(x: int):  
    """Find an integer x such that the sum of the digits of x squared equals x."""  
    return sum(int(d) for d in str(x ** 2)) == x 
```

Solvers, post your solutions in the comments using the following formatting:
````
<details><summary>Reveal solution</summary>

```python
def sol():
    return 9  # replace with your solution
```
</details>
````
