Hi,

this is my code

```
{\mu,\nu}::Indices(vector).
f^{\mu?\nu?}::AntiSymmetric.
h^{\mu?\nu?}::Symmetric.
{u^{\mu?},f^{\mu?\nu?},h^{\mu?\nu?}}::NonCommuting.
ex:=u^{\mu}u^{\nu}f^{\nu\mu}+f^{\mu\nu}h^{\mu\nu};
canonicalise(_);
```

the result is $0$, it's wrong. How to get the correct result?(i.e. $-u^{\mu}u^{\nu}f^{\mu\nu}$)