./spark 18 28 65 73 33 39 28 10 10 7 1 6 2 3 7 3 2 1 3 34

  ▂▃▇█▄▄▃▁▁▁▁▁▁▁▁▁▁▁▁▄
     ^ 40k-49k

[1] https://github.com/holman/spark