def top(n, scores)
      scores.sort {|a,b| a[1] <=> b[1]}.map{|x| x[0]}.first(n)
    end
def top(n, scores)
      scores.sort {|a,b| a[1] <=> b[1]}.map{|x| x[0]}.first(n)
    end
Return top scoring, sorted by lowest