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The 24-cell is one of the convex regular polytopes in four dimensions.

He found a regular dodecahedron-shaped spicy cod roe.

He made a model of a regular icosahedron.

He drew water from the well.

It is said that the education system in Japan is strict.

His energy is unstoppable.

My surname is Tanaka.

His surname has a historical background.

Education about sex is very important.