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First level tubulating tetraflexagon cutout


  
Figure 5: Top side of the first level tubulating tetraflexagon cutout, characterized by the sign sequence (+ + - -). The cutout is small enough that both top and bottom for two sectors are shown, enough to make two separate flexagons.
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Figure 6: reverse side of the first level tubulating tetraflexagon cutout.
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Example user SuSE Linux 6.2
2000-09-05