Step by step 4 steps
  1. Step 1

    good to set up in middle...

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  2. Step 2

    or side

    O1O2O3O4O5O6O7D1D2D3D4D5D6D7
  3. Step 3

    make cuts that could work...

    O1O2O3O4O5O6O7D1D2D3D4D5D6D7
  4. Step 4

    make more cuts that could work

    O1O2O3O4O5O6O7D1D2D3D4D5D6D7