https://regex101.com/r/Xvd3iM/2/debugger
　 　→ https://i.imgur.com/ReQExe8.png
　 　 　6steps
https://regex101.com/r/Xvd3iM/5/debugger
　 　→ https://i.imgur.com/JogTUsu.png
　 　 　8steps

https://regex101.com/r/Xvd3iM/3/debugger の 7steps にすら劣るのになぜか自信満々