| | | | | | | | | | 7 1 | 3 | | | | | | | | | | | | 1 | | | | | | | | | | | | | | | | | | | ○ | × | | | | ○ ○ | | | | | | | | | | | | | | | | | | | | | | | | | | | | 2 2 | | | | | | | |