1/1

1/1

1/3

2/3

3/3

1/2

2/2

1/3

2/3

3/3

1/2

2/2

1/1

1/1

1/2

2/2

1/1

1/4

2/4

3/4

4/4

1/4

2/4

3/4

4/4