1

1

1

1

2

2

1

1

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

2

1

0

0

1

1

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1