Dog, Hen and Corn
You are going home with your dog, hen and corn. On the way, you find a river. A small boat is there, you have to
take all your items across the river
The boat is very small so you can carry only one thing (or none) with you at a time.
You can't leave the dog with the hen. (dogs eat hens)
You can't leave the hen with the corn. (hens eat corns)