*1:See also https://sumita-m.hatenadiary.com/entry/2020/08/14/091741 https://sumita-m.hatenadiary.com/entry/2020/09/05/170400 https://sumita-m.hatenadiary.com/entry/2021/01/27/083235 https://sumita-m.hatenadiary.com/entry/2021/06/03/073508 https://sumita-m.hatenadiary.com/entry/2021/06/28/010650 https://sumita-m.hatenadiary.com/entry/2021/07/02/213914 https://sumita-m.hatenadiary.com/entry/2021/11/07/094741 https://sumita-m.hatenadiary.com/entry/2021/11/20/165358 https://sumita-m.hatenadiary.com/entry/2021/12/16/135040 https://sumita-m.hatenadiary.com/entry/2021/12/17/124254 https://sumita-m.hatenadiary.com/entry/2021/12/20/103055
