sTAIRCASES

22

22

17

17

16

16

21

21

23

23

14

14

15

15

20

20

19

19

13

13

18

18

12

12

8

8

9

9

11

11

10

10

7

7

6

6

5

5

2

2

3

3

4

4

1

1