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Natan Origami: Heart Box Diagram 1
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Natan Origami: Heart Box Diagram 3
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Natan Origami: Heart Box Diagram 2
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Natan Origami: Heart Box Diagram 4
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Natan Origami: Heart Box Diagram 5
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Natan Origami: Heart Box Diagram 6
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Natan Origami: Heart Box Diagram 7