Here is my question:

I have a set S with 30 elements, together with a symmetric binary relation R, which
holds between some of the elements of S. I would like to find out all the
permutations of S which preserve the relation R, in the following precise sense
f: S to S, f bijection satisfying "a R b if and only if f(a) R f(b)".

Is there any program in GAP that would allow me to do that?

Thanks, Victor

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