He wrote his name using a logogram.

He wrote a message using mirror writing.

This shape is called a muoctahedron, in other words, a hexagonal four-piece square hole twisted polyhedron.

This is a 六角四片四角孔ねじれ正多面體, in other words, a muoctahedron.

This is a model of a muoctahedron.

This mutetrahedron plays a very important role in the world of mathematics.

This mutetrahedron has a very unusual shape.

This is a model of a mutetrahedron.