3 19 | | | | | | | | 2021 2 6 | ︽ | ︾ | | | | ︵ ︶ | | | | | | | | ︽ ︾ | | | ︽ ︾ | | ︽ ︾ ︽ ︾ | ︽ ︾ | ︽ | ︾ | | | | | | | | ︵ ︶ | |