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"tree-puzzle" versions published in Ubuntu

Zesty (5.2-8build2): universe/science
Yakkety (5.2-8build1): universe/science
Xenial (5.2-8build1): universe/science
Vivid (5.2-7ubuntu1): universe/science
Trusty (5.2-7ubuntu1): universe/science
Precise (5.2-7): universe/science