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- Added solutions by Ulrich Rieke.
- Added solutions by Laurent Rosenfeld.
- Added solutions by Thomas Kohler.
- Added solutions by Simon Proctor.
- Added solutions by Mark Anderson.
- Added solutions by W. Luis Mochan.
- Added solutions by Jorg Sommrey.
- Added solutions by David Ferrone.
- Added solutions by Andread Voegele.
- Added solutions by E. Choroba.
- Added solutions by Peter Campbell Smith.
- Added solutions by Steven Wilson.
- Added solutions by Avery Adams.
- Added solutions by Lubos Kolouch.
- Added solutions by Roger Bell_West.
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