cl1=0.5;
//Mesh.Algorithm3D=10;
Mesh.Format=30;

Point(1)={-1,0,0,cl1};
Point(2)={1,0,0,cl1};
Point(3)={-1.8,-1,0,cl1};
Point(4)={1.8,-1,0,cl1};
Point(5)={0,-2,0,cl1};

Point(6)={-1,0,-5,cl1};
Point(7)={1,0,-5,cl1};
Point(8)={-1.8,-1,-5,cl1};
Point(9)={1.8,-1,-5,cl1};
Point(10)={0,-2,-5,cl1};

Point(11)={-5,3,0,cl1};
Point(12)={5,3,0,cl1};
Point(13)={-5,-15,0,cl1};
Point(14)={5,-15,0,cl1};

Point(15)={-5,3,-5,cl1};
Point(16)={5,3,-5,cl1};
Point(17)={-5,-15,-5,cl1};
Point(18)={5,-15,-5,cl1};

Line(1) = {3, 1};
Line(2) = {1, 2};
Line(3) = {2, 4};
Line(4) = {4, 5};
Line(5) = {5, 3};
Line(6) = {10, 9};
Line(7) = {9, 7};
Line(8) = {7, 6};
Line(9) = {6, 8};
Line(10) = {8, 10};
Line(11) = {10, 5};
Line(12) = {9, 4};
Line(13) = {7, 2};
Line(14) = {6, 1};
Line(15) = {8, 3};
Line(16) = {11, 12};
Line(17) = {12, 14};
Line(18) = {14, 13};
Line(19) = {13, 11};
Line(20) = {13, 17};
Line(21) = {17, 18};
Line(22) = {18, 16};
Line(23) = {16, 15};
Line(24) = {15, 17};
Line(25) = {18, 14};
Line(26) = {12, 16};
Line(27) = {15, 11};
Line Loop(1) = {5, -15, 10, 11};
Plane Surface(1) = {1};
Line Loop(2) = {11, -4, -12, -6};
Plane Surface(2) = {2};
Line Loop(3) = {12, -3, -13, -7};
Plane Surface(3) = {3};
Line Loop(4) = {13, -2, -14, -8};
Plane Surface(4) = {4};
Line Loop(5) = {14, -1, -15, -9};
Plane Surface(5) = {5};


Line Loop(10) = {23, 27, 16, 26};
Plane Surface(10) = {10};
Line Loop(11) = {22, -26, 17, -25};
Plane Surface(11) = {11};
Line Loop(12) = {21, 25, 18, 20};
Plane Surface(12) = {12};
Line Loop(13) = {27, -19, 20, -24};
Plane Surface(13) = {13};





//+
Line Loop(14) = {16, 17, 18, 19};
//+
Line Loop(15) = {2, 3, 4, 5, 1};
//+
Plane Surface(14) = {14, 15};
//+
Line Loop(16) = {22, 23, 24, 21};
//+
Line Loop(17) = {6, 7, 8, 9, 10};
//+
Plane Surface(15) = {16, 17};
//+
Surface Loop(1) = {14, 10, 15, 11, 12, 13, 1, 5, 4, 3, 2};
//+
Volume(1) = {1};
