RenameRelations

RenameRelations(R) returns the relation matrix defined by R. For example,
gap> M := [["red", "blue"],["blue", "red"]];;
gap> RenameRelations(M);            
[ [ 0, 1 ], [ 1, 0 ] ]
gap> M := [[5, 3, 1], [1, 5, 3], [3, 1, 5]];;
gap> RenameRelations(M);            
[ [ 0, 2, 1 ], [ 1, 0, 2 ], [ 2, 1, 0 ] ]