−4
−3
−2
−1
0
1
2
3
4
−4
−4
−3
−3
−2
−2
−1
−1
0
0
−3
−3
−3
−2
−2
−1
−1
0
0
1
−2
−3
−2
−2
−1
−1
0
0
1
1
−1
−2
−2
−1
−1
0
0
1
1
2
0
−2
−1
−1
0
0
1
1
2
2
1
−1
−1
0
0
1
1
2
2
3
2
−1
0
0
1
1
2
2
3
3
3
0
0
1
1
2
2
3
3
4
4
0
1
1
2
2
3
3
4
4
|
| ||||||||||
| −4 | −3 | −2 | −1 | 0 | 1 | 2 | 3 | 4 | ||
|
| −4 | −4 | −3 | −3 | −2 | −2 | −1 | −1 | 0 | 0 |
| −3 | −3 | −3 | −2 | −2 | −1 | −1 | 0 | 0 | 1 | |
| −2 | −3 | −2 | −2 | −1 | −1 | 0 | 0 | 1 | 1 | |
| −1 | −2 | −2 | −1 | −1 | 0 | 0 | 1 | 1 | 2 | |
| 0 | −2 | −1 | −1 | 0 | 0 | 1 | 1 | 2 | 2 | |
| 1 | −1 | −1 | 0 | 0 | 1 | 1 | 2 | 2 | 3 | |
| 2 | −1 | 0 | 0 | 1 | 1 | 2 | 2 | 3 | 3 | |
| 3 | 0 | 0 | 1 | 1 | 2 | 2 | 3 | 3 | 4 | |
| 4 | 0 | 1 | 1 | 2 | 2 | 3 | 3 | 4 | 4 |