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- Added solutions by Ulrich Rieke.
- Added solutions by Andrew Shitov.
- Added solutions by Feng Chang.
- Added solutions by PokGoPun.
- Added solutions by Niels van Dijke.
- Added solutions by Simon Proctor.
- Added solutions by Peter Campbell Smith.
- Added solutions by David Ferrone.
- Added solutions by E. Choroba.
- Added solutions by Mark Anderson.
- Added solutions by Andreas Mahnke.
- Added solutions by Ali Moradi.
- Added solutions by Robert Ransbottom.
- Added solutions by Ulrich Reining.
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