Case

Number of Routes

Description of routes

I

4

13-9-10-11-3-1-2-5

0-1-2-5-7-14-6-9

8-14-5-7-9-13-12-10

0-1-4-3-11-10-9-12

II

6

13-12-10-11-3-4-1-0

9-6-14-7-5-2-1-0

12-13-9-10-11-3-5-7

4-3-1-2-5-14-7-9

8-14-5-7-9-12-10-11

6-9-10-11-3-5-2

III

7

0-1-3-5-7-9-6

8-14-6-9-10-11-3-4

0-1-2-5-3-11-10-12

0-1-4-3-11-10-9-7

2-1-3-5-7-14-6-9

9-10-11-3-5-2-1-4

13-12-10-9-6-14-8

IV

8

6-14-7-5-3-4-1-2

1-4-3-11-10-12-13

0-1-3-11-10-9-6

8-14-7-5-3-11-10-9

11-10-12-13-9-6-14-8

8-14-5-2-1-4-3

9-10-11-3-4-1-2-5

12-13-9-7-5-2-1-0