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BP201 |
| Two of the shapes make tiles along their border lines vs. not so. |
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BP202 |
| Even number vs. odd number. |
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BP203 |
| Prime number vs. composite number. |
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BP205 |
| Two clusters of two elements each vs. not so. |
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BP206 |
| Curve ends in a roughly up or down direction vs. curve ends in a roughly left or right direction. |
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BP207 |
| Curve ends on the left part of the box vs. curve ends on the right part of the box. |
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BP208 |
| All curves spiral counterclockwise, starting from maximum curvature vs. all curves spiral clockwise, starting from maximum curvature. |
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