lc = 50;
lt = 1;
ld = 2;

pBox=lc/2;
pLine=lt/5;


Point(1) = {-lc, -lc, -lc, pBox};
Point(2) = {lc, -lc, -lc, pBox};
Point(3) = {lc, -lc, lc, pBox};
Point(4) = {-lc, -lc, lc, pBox};
Point(5) = {-lc, lc, -lc, pBox};
Point(6) = {lc, lc, -lc, pBox};
Point(7) = {lc, lc, lc, pBox};
Point(8) = {-lc, lc, lc, pBox};
Point(9) = {-lt, lc, -lt, pLine};
Point(10) = {lt, lc, -lt, pLine};
Point(11) = {lt, lc, lt, pLine};
Point(12) = {-lt, lc, lt, pLine};
Point(13) = {-lt, lc-ld, -lt, pLine};
Point(14) = {lt, lc-ld, -lt, pLine};
Point(15) = {lt, lc-ld, lt, pLine};
Point(16) = {-lt, lc-ld, lt, pLine};
Line(1) = {4, 3};
Line(2) = {3, 2};
Line(3) = {2, 1};
Line(4) = {1, 4};
Line(5) = {8, 7};
Line(6) = {7, 6};
Line(7) = {6, 5};
Line(8) = {5, 8};
Line(9) = {8, 4};
Line(10) = {7, 3};
Line(11) = {6, 2};
Line(12) = {5, 1};
Line(13) = {16, 15};
Line(14) = {15, 14};
Line(15) = {14, 13};
Line(16) = {13, 16};
Line(17) = {12, 11};
Line(18) = {11, 10};
Line(19) = {10, 9};
Line(20) = {9, 12};
Line(21) = {12, 16};
Line(22) = {11, 15};
Line(23) = {10, 14};
Line(24) = {9, 13};
Line Loop(25) = {9, 1, -10, -5};
Plane Surface(26) = {25};
Line Loop(27) = {10, 2, -11, -6};
Plane Surface(28) = {27};
Line Loop(29) = {11, 3, -12, -7};
Plane Surface(30) = {29};
Line Loop(31) = {12, 4, -9, -8};
Plane Surface(32) = {31};
Line Loop(33) = {1, 2, 3, 4};
Plane Surface(34) = {33};
Line Loop(35) = {13, -22, -17, 21};
Plane Surface(36) = {35};
Line Loop(37) = {22, 14, -23, -18};
Plane Surface(38) = {37};
Line Loop(39) = {23, 15, -24, -19};
Plane Surface(40) = {39};
Line Loop(41) = {24, 16, -21, -20};
Plane Surface(42) = {41};
Line Loop(43) = {13, 14, 15, 16};
Plane Surface(44) = {43};
Line Loop(45) = {5, 6, 7, 8};
Line Loop(46) = {17, 18, 19, 20};
Plane Surface(47) = {45, 46};
Surface Loop(48) = {26, 32, 30, 28, 34, 47, 42, 40, 38, 36, 44};
Volume(49) = {48};
Physical Line(50) = {17,18,19,20};
Physical Surface(51) = {26, 34, 28, 30, 32};
Physical Surface(52) = {36, 44, 40, 38, 42};
Physical Surface(53) = {47};
Physical Volume(54) = {49};
