z

1

0

4

2

3

0

3

4

2

0

1

2

4

4

2

4

3

3

3

4

0

2

2

1

1

4

1

2

2

3

x

1

1

0

0

0

0

0

0

0

0

0

1

1

0

0

0

1

1

1

0

0

0

0

0

0

0

0

0

0

0