| ︽ | ︾ 4 17 | | | | | 4 | | | | | | | | | | | | ︽ | | ︾ | | | | | | | ︽ | | | ︾ | | | | | ︽ 3 | | ︾ | | | | | | | 3 | | | | | | | ︽ | | | ︾ | | | | | ︽ | | ︾ | | | | | | | | | | |