Given a *white space tokenized* field containing only numbers, I want to write a query able to match the documents containing:

1) ALL the numbers in a Set A

AND

2) At least one of the numbers in a Set B

This is what I wrote

```
q=wstf:( 1 AND 2 AND 3 AND 4 ) AND ( 5 OR 6 OR 7 OR 8 ) // (Set A) AND (Set B)
```

I remember (but I might be wrong) that it is possible to specify the default operator within the expression (I'm NOT talking about the *q.op* parameter) in order to get something like

```
q=wstf:(AND 1 2 3 4) AND wstf:(OR 5 6 7 8)
```

But I cannot find anything like this in the Reference Guide.

EDIT

Please, notice I set the *default operator* to AND

Any help?