Human registration

If you want to submit a website for a search engine or want to join a discussion group nowadays you have to show that you are a human and not a machine performing an automated registration. The following is asked, interpret some scratchy cluttered shapes and show that you are able to decipher these into digits and letters. I guess the problem has become that machines have become good at this task too, as I had no idea what to fill in here:

And to show there are also friendlier versions (moreover, this one is optinional);

submitted by Dick de Waard

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