%problem from http://www.parade.com/askmarilyn/numbrix/archive/blueberry/Numbrix-20120129.html
#const n=9.
hint(1,1,47).
hint(1,3,45).
hint(1,5,43).
hint(1,7,33).
hint(1,9,29).
hint(3,1,51).
hint(3,9,27).
hint(5,1,81).
hint(5,9,21).
hint(7,1,73).
hint(7,9,15).
hint(9,1,69).
hint(9,3,67).
hint(9,5,61).
hint(9,7,7).
hint(9,9,9).
