| | | | | | | | | | 2 | | | | | | | | | | | | | | 2+8+13 | 2 8 | 13 | 2+11+N | | 2 11 | | | 3+N | + | | | | | | ︱ | | ︱ | | | | | | | | | | | | | | | | | | | | | | |