He explains here and in the comments too nostr:nevent1qqs8wxm00jrn55j776rgleq8qqgxpzvqug8ege52d8au58m9t38y38sprfmhxue69uhhqatjv9mxjerp9ehx7um5wghxcctwvshsygzjkjs8d09mhhp6rth6xu6czm8hfxfmrwxmyq4srjyrck9707kch5psgqqqqqqsjuslcm