[youtube]http://www.youtube.com/watch?v=GkHNNPM7pJAIf, with all the preparations needing to be finished in time, you find some time, here is something that may make you smile.

Happy Christmas everyone!

– Rike Horstmann

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High school teacher. Soccer fan (Werder Bremen, yeah!). Knitter and book-binder. Devotee of mathematical puzzles. German.