lc = 0.25;
Point(1) = {0.0, 0.0, -1.0, lc};
Point(2) = {1.0, 0.0, -1.0, lc};
Point(3) = {0.0, 1.0, -1.0, lc};
Point(4) = {-1.0, 0.0, -1.0, lc};
Point(5) = {0.0, -1.0, -1.0, lc};

Point(6) = {0.0, 0.0, 1.0, lc};
Point(7) = {1.0, 0.0, 1.0, lc};
Point(8) = {0.0, 1.0, 1.0, lc};
Point(9) = {-1.0, 0.0, 1.0, lc};
Point(10) = {0.0, -1.0, 1.0, lc};

Circle(13) = {2,1,3};
Circle(14) = {3,1,4};
Circle(15) = {4,1,5};
Circle(16) = {5,1,2};

Circle(17) = {8,6,7};
Circle(18) = {9,6,8};
Circle(19) = {10,6,9};
Circle(20) = {7,6,10};

Line(30) = {2, 7};
Line(31) = {3, 8};
Line(32) = {4, 9};
Line(33) = {5, 10};

Line(34) = {7, 2};
Line(35) = {8, 3};
Line(36) = {9, 4};
Line(37) = {10, 5};

Line Loop(38) = {34,13,-35,17};
Ruled Surface(39) = {38};
Line Loop(40) = {-36,18,35,14};
Ruled Surface(41) = {40};
Line Loop(42) = {36,15,-37,19};
Ruled Surface(43) = {42};
Line Loop(44) = {37,16,-34,20};
Ruled Surface(45) = {44};
Line Loop(46) = {18,17,20,19};
Plane Surface(47) = {46};
Line Loop(48) = {15,16,13,14};
Plane Surface(49) = {48};
Surface Loop(50) = {47,41,43,49,45,39};
Volume(51) = {50};
