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- Added solutions by Ulrich Rieke.
- Added solutions by Reinier Maliepaard.
- Added solutions by Mark Anderson.
- Added solutions by Steven Wilson.
- Added solutions by E. Choroba.
- Added solutions by David Ferrone.
- Added solutions by Peter Meszaros.
- Added solutions by Peter Campbell Smith.
- Added solutions by W. Luis Mochan.
- Added solutions by PokGoPun.
- Added solutions by Feng Chang.
- Added solutions by Roger Bell_West.
- Added solutions by Bob Lied.
- Added solutions by Matthew Neleigh.
- Added solutions by Dave Jacoby.
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