LISP find path islands

[Fleww]

Is there any lisp that can find path islands around the drawing?

I know there is GAPS lisp that can find but it dont work good for me, couse i have not only polylines, I have mix of lines and polylines, almost all lines, and GAPS dont work well.
Is there something that can make me indentify the not connected lines and polylines? but connected i mean everything thats like island dont touch in vertex with others.

[ВeekeeCZ]

Ilustrate.

[Fleww]

here are pictures and dwg

[ВeekeeCZ · Accepted solution]

Try this if it identifies groups correctly. Then we could modify it to mark all groups.

https://www.lee-mac.com/chainsel.html

[Fleww]

Yea its maybe opposite it selects that is connected, and I was needing whats not connected on the drawing.