If you have any algorithm or source at hand I would be really happy to add this! Or even better: If you got some time spare, feel free to help out with s4 :D h

If you have any algorithm or source at hand I would be really happy to add this! Or even better: If you got some time spare, feel free to help out with s4 :D https://github.com/simonfrey/s4 https://github.com/simonfrey/s4