m19: triacontahedron, 30 rhombs		m20: cube with mäandric pattern
	m21: cube made of trigonal and hexagonal layers(1)
m21a: cube made of trigonal and hexagonal layers (2)		m22: square antiprism with inner structure
	m23: icosahedron, 20 triangles
m28: 4 hexagons in a cuboctahedron (no polyhedron!)	m29: cube made of stripes

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