"<setops>"
	"setop" a @union @difference @symdiff
	"setop" b @union @difference @symdiff
	"setop" c @union @intersect @product
	"setop" d @union @intersect @product
	"setop" e @union @symdiff
	"setop" f @union @symdiff
"<setops>"
	"setop" a b @union @difference @symdiff
	"setop" b c @union @symdiff @intersect @product
	"setop" c d @union @intersect @product
	"setop" d e @union @symdiff @intersect @product
	"setop" e f @union @symdiff
	"setop" f a @union @symdiff @product
"<setops>"
	"setop" a e @union @symdiff @product
	"setop" b f @union @symdiff @product
	"setop" c a @union @symdiff @intersect @product
	"setop" d b @union @symdiff @intersect @product
	"setop" e c @union @symdiff @intersect @product
	"setop" f d @union @symdiff @intersect @product

