13
19 16 13
+4 +4 +5

15

12

8
x 15 x x x 12 x 8 13
+3 +∞ +6 +3 +6

x

12

8

x

x

6

x

5

7
x x x 12 x 8 x x x x x 6 x x x 5 x 7
+6 +6 +∞ +3 +3 +4

x

x

x

6

x

2

x

x

x

6

x

3

x

x

x

2

x

3