1, rabbit, ferret, gerbel, turtle
2. ferret, gerbel, turtle, rabbit
3. gerbel, turtle, rabbit, ferret
4. turtle, rabbit, ferret, gerbel
5. rabbit, gerbel, ferret, turtle
6. rabbit, gerbel, turtle, ferret
7. rabbit, turtle, gerbel, ferret
8. rabbit, turtle, ferret, gerbel
9. rabbit, ferret, turtle, gerbel
This should give you the idea thatabeginning with the rabbit, there are 6 possibilities. Then beginning with each of the other 3 animals, there are again 6 possibilities for each animal.
What kind of total do you have with 4 X 6?