アイマスクの使用例がロボコップ感 https://m.banggood.com/Bluetooth-Sleeping-Headphones-Headband-Thin-Soft-Elastic-Comfortable-Wireless-Music-Headphones-Eye-Mask-for-Side-Sleeper-p-1800083.html?akmClientCountry=JP&utm_design=18&cur_warehouse=CN&utm_source=emarsys&utm_medium=Mail_home18_email&utm_campaign=newsletteremarsys&utm_content=linux&sc_src=email_4733199&sc_eh=8293e709a192dbf21&sc_llid=611301&sc_lid=199657107&sc_uid=MzqgsZdZ6R
思考の /dev/null
