Correct solutions came from Ahron Teitelman, Israel; Al Zimmermann, USA; Bill Webb, USA; Gary Smith, USA; Kate Lyons, Bradley University; Allen Druze; Mark Maroon, Bradley University; Philippe Fondanaiche, France; Ştefan Gaţachiu, Romania; Farid Lian, Colombia; Leonardo Bitrán, Chile; Robert Andry, Bradley Univesity; Dean Neilly, Bradley University; Tran Vu Thien, USA; Burkart Venzke, Germany; Chris Collins, Bradley University; David Stigant, USA; Brett Hendricks, USA; Ron Welch, USA; John Snyder, USA; Lou Cairoli, USA.

There is only one solution.

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