universe@7: _ 1 _ 9 _ _ 8 _ _
universe@7: _ _ _ _ _ 8 _ _ 4
universe@7: 6 _ 5 _ _ _ 7 _ _
universe@7: _ 9 _ _ 6 _ _ _ 8
universe@7: _ _ _ 2 _ 7 _ _ _
universe@7: 8 _ _ _ 3 _ _ 6 _
universe@7: _ _ 2 _ _ _ 5 _ 3
universe@7: 1 _ _ 4 _ _ _ _ _
universe@7: _ _ 6 _ _ 2 _ 1 _