hits = 0 ; total = 0
  (1..6).each do |d1|
    (1..6).each do |d2|
      (1..6).each do |d3|
        (1..6).each do |d4|
          (1..6).each do |d5|
            (1..6).each do |d6|
              hits+=1 if d1+d2+d3+d4+d5+d6 >= dif
              total += 1
            end
          end
        end
      end
    end
  end