*1:See also https://sumita-m.hatenadiary.com/entry/20150730/1438223216 https://sumita-m.hatenadiary.com/entry/20170321/1490117707 https://sumita-m.hatenadiary.com/entry/20170511/1494477182 https://sumita-m.hatenadiary.com/entry/2019/12/02/001041 https://sumita-m.hatenadiary.com/entry/2020/01/04/235902 https://sumita-m.hatenadiary.com/entry/2020/01/16/024951 https://sumita-m.hatenadiary.com/entry/2020/01/22/082357 https://sumita-m.hatenadiary.com/entry/2020/02/01/082715 https://sumita-m.hatenadiary.com/entry/2020/02/13/210049 https://sumita-m.hatenadiary.com/entry/2020/02/14/221555 https://sumita-m.hatenadiary.com/entry/2020/02/16/131441 https://sumita-m.hatenadiary.com/entry/2020/02/27/130811 https://sumita-m.hatenadiary.com/entry/2020/03/07/101748 https://sumita-m.hatenadiary.com/entry/2020/03/18/100607 https://sumita-m.hatenadiary.com/entry/2020/03/24/104404 https://sumita-m.hatenadiary.com/entry/2020/04/10/220658 https://sumita-m.hatenadiary.com/entry/2020/05/15/143825 https://sumita-m.hatenadiary.com/entry/2020/05/25/082501 https://sumita-m.hatenadiary.com/entry/2020/05/29/144733 https://sumita-m.hatenadiary.com/entry/2020/06/01/221341
