Hi,

With the following definitions

```
{i,j,k,m,n,p}::Indices(space, position=free);
{i,j,k,m,n,p}::Integer(1..4);
{a,b,c,d,e}::Indices(gauge, parent=space, position=free);
{a,b,c,d,e}::Integer(1..3);
\delta{#}::KroneckerDelta;
\epsilon{#}::EpsilonTensor(delta=\delta);
```

I would like to calculate the below product of two Epsilon tensors e transform them to a delta function

```
ex:=\epsilon_{a b c}\epsilon_{a i j 4};
epsilon_to_delta(_);
```

How can I tell to Cadabra that in this situation uses the `a,b,c,...`

indices instead to `i,j,...`

indices because of the one fixed index to 4?