3. a = 2 b = 0 c = 1 d = 3
4. a = 2 b = 0 c = 3 d = 2
5. a = 0 b = 2 c = 3 d = 1
6. a = 3 b = 1 c = 2 d = 0
7. a = 3 b = 1 c = 2 d = 0
8. a = 1 b = 2 c = 3 d = 0
9. a =3 b = 0 c = 1 d = 2
10. a= 2 b = 0 c = 1 d = 3
11. a= 3 b = 2 c = 1 d = 0
12.a = 2 b = 1 c = 3 d = 0
13. a = 0 b = 2 c = 1 d = 3
14. a = 0 b = 1 c = 2 c = 3