*1:See also https://sumita-m.hatenadiary.com/entry/2021/10/31/144030 https://sumita-m.hatenadiary.com/entry/2021/11/03/092302https://sumita-m.hatenadiary.com/entry/2021/11/05/124648 https://sumita-m.hatenadiary.com/entry/2021/11/12/105819
*2:See also https://sumita-m.hatenadiary.com/entry/2020/04/02/221024 https://sumita-m.hatenadiary.com/entry/2020/07/22/134505 https://sumita-m.hatenadiary.com/entry/2021/03/03/003829