S squared

S squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squaredS squared