n

1

2

3

4

5

6

7

Couches

Sous-couche

l

0

0

0

0

0

0

0

s (1 - 7)

1

1

1

1

1

1

p (2 - 7)

2

2

2

2

2

d (3 - 7)

3

3

3

3

f (4 - 7)

OE

1

2

3

4

5

6

7

s (1 - 7)

3

4

5

6

7

8

p (3 - 8)

5

6

7

8

9

d (5 - 9)

7

8

9

10

f (7 - 10)