a make 6 example that looks reasonable....

misc/examples/cube.tetra

+!Tetrahedra
+8
+0.000000  0.000000  0.000000     
+1.000000  0.000000  0.000000   
+0.000000  1.000000  1.000000   
+0.000000  0.000000  1.000000   
+0.000000  1.000000  0.000000     
+1.000000  0.000000  1.000000   
+1.000000  1.000000  0.000000
+1.000000  1.000000  1.000000
+
+6
+1 2 3 0
+1 2 4 0  
+1 2 3 5  
+1 2 4 6   
+1 2 7 6   
+1 2 7 5
+
+12
+-2  3  3  2  0
+-2  3  1  3  0
+-1  3  4  1  0
+-2  3  2  4  0
+-1  3  2  3  5
+-2  3  5  3  1
+-2  3  4  2  6
+-1  3  4  6  1
+-2  3  2  7  6
+-2  3  6  7  1
+-1  3  2  5  7
+-2  3  7  5  1
+
+0 -1
+1 -1
+2 -1
+3 -1
+4 -1
+5 -1
+6 -1
+7 -1