# UNGROUPED_AND_OR

An expression mixes & and | without brackets.

## What happened

Python joins `&` before `|`, so an expression that mixes them without brackets does not run in the order it reads. Forge refuses it so the order is always on the page.

## What to do

Add brackets: `(a & b) | c` or `a & (b | c)`.

## Example

```text
strategy.py, line 44: Add brackets to a & b | c. Python joins & before |, so a & b | c runs as (a & b) | c. Write (a & b) | c or a & (b | c). [UNGROUPED_AND_OR]
```

The wording of the message depends on your file, and the code does not. An error stops the file from loading.