Hi, can you define a general tensor symmetry?

Some simpler symmetry can be defined using the **TableauSymmetry**, but I have not figured out how to define a more complex one. I admit that *young tableaux* was too unreasonable. How to define a general symmetry tensor?

Specifically, I need to define a tensor with this symmetry:

```
A_{a b c i j k} = A_{i j k a b c}
A_{a b c i j k} = - A_{a c b i j k}
A_{a b c i k j} = - A_{a b c i k j}
```

Thank you for the advice.