Basic grids - Rotational Symmetry (1)
R(06,2)-hmr#1086 R(06,3)-hmr#1112 R(07,4)-hmr#1119
R(07,4)-hmr#1216 R(07,4)-hmr#1256 R(07,4)-hmr#1290
R(08,3)-hmr#1134 R(08,5)-hmr#1264 R(08,5)-hmr#1265