z

2

1

1

2

1

3

2

3

0

0

2

1

1

0

4

2

0

4

3

1

4

0

3

4

3

3

3

2

0

0

x

1

1

1

1

1

1

1

1

1

1

1

0

1

1

1

1

1

1

1

0

0

1

1

1

1

1

1

0

1

0