.: Generate a list of Skin Bones :.

Hi, Everybody!
Does anyone knows a script that generates a list in .TXT of bones added to a skin mesh modifier? (See the picture above please)

https://www.dropbox.com/s/reh1fmpes25z9x1/listthisplease.jpg?dl=0

If no, can anyone help me?
Thank you!
Best Regards

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