formation: improper
| A1 | 16 | neighbors balance & swing
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| A2 | 8 | long lines forward & back
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| 8 | ones swing, end facing down ⁋
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| B1 | 8 | next neighbors mirror do si do, ones splitting twos
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| 8 | twos swing, end facing up
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| B2 | 8 | neighbors mirror do si do, twos splitting ones
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| 8 | circle left 4 places
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