S x x 1

S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1S x x 1