of.group.cohelement.bool.subtract
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.. raw:: html
.. role:: red
.. role:: blue
**of.**\ :red:`group.cohelement.bool.subtract` :blue:`*group_tag*` :blue:`tag1` :blue:`tag2` ...
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Get the bool subtract of the second - last cohesive element groups and store them into the first tags.
**Parameters:**
**group_tag:** tag of the group.
**tag:** cohesive element groups to be operated.
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Example:
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.. code-block::
of.group.coheelement.bool.subtract [rock] [rock_up] [rock_down] [rock_left] [rock_right]