Symmetry The templates are indistinguishable and can be permuted The templates are indistinguishable and can be permuted Swap all designs on one template with all those on a second template Swap all designs on one template with all those on a second template Break this symmetry by distinguishing the templates Break this symmetry by distinguishing the templates R1 <= R2 <= R3 … R1 <= R2 <= R3 …