2. Servants and daughters cross the river, and servants and dogs come back;

3. Mother and daughter cross the river and mother comes back;

4. Mom and Dad cross the river and Dad comes back;

5. The servant and the dog cross the river and the mother comes back;

6. Mom and Dad cross the river and Dad comes back;

7. Father and son cross the river, and servants and dogs return;

8. The servant and his son crossed the river and the servant came back;

9. Servants and dogs cross the river.