1/2 3/4

2

23

1/2 3/4

23 25

2 3

2

2 3

23

23

2 3 4

2 3

23 25

2 3

2 3

2 3

2 3

2

2

2 3

2

1/2 3/4

2 3

1/2 3/4

2