1 10 R 0 0 0 5 5 0 R 10 10 10 5 5 10 Q 5 5 Q 1 1 Q 9 9 R -6 -4 -4 -6 -6 -6 Q -5 -5 Q 1 1 R 0 5 4 4 5 0 Q 3 3