Solidworks Macro Request - Compare bodies in assemblies and give them a number

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I'am searching a macro that find equal bodies in an assembly with multibodyparts and give each body a number.
In other CAD-Software this function is called "positioning"

My idea is, that the bodies will stored in an external file/database and when the macro run will load the data from the database
and compare the selected Multibodyparts of the assembly.
If their is no equal part so the bodies are added in the database.