1. 79.
    0
    up up up
    ···
  2. 78.
    0
    up up up
    ···
  3. 77.
    0
    up up up
    ···
  4. 76.
    0
    up up up
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  5. 75.
    0
    up up up
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  6. 74.
    0
    up up up
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  7. 73.
    0
    up up up
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  8. 72.
    0
    up up up
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  9. 71.
    0
    up up up
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  10. 70.
    0
    up up up
    ···
  11. 69.
    0
    up up up
    ···
  12. 68.
    0
    up up up
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  13. 67.
    0
    up up up
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  14. 66.
    0
    up up up
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  15. 65.
    0
    up up up
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  16. 64.
    0
    up up up
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  17. 63.
    0
    up up up
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  18. 62.
    0
    up up up
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  19. 61.
    0
    up up up
    ···
  20. 60.
    0
    up up up
    ···