Einstein's Puzzle

Friends, I hope you have some time to dedicate to this problem that I found very interesting. Send me the answer and I will tell you whether or not you belong to the 2% of the world's population that could solve it.

Einstein wrote this puzzle in the last century and said that 98% of the world's population could not solve it. I do not think it's difficult. It is a matter of being patient and interested in coming up with the answer. Here it goes.

There are five houses of five different colors. In each of the houses lives a person with a different nationality. Each of the owners drinks a certain type of drink, smokes a certain brand of cigarettes and has a certain pet. No owner has the same pet, neither smokes the same brand of cigarettes nor drinks the same drink.
The question is: Who owns the little fish?

Keys:

1. The British lives in the red house.
2. The Swede has a pet dog.
3. The Danish takes tea.
4. The green house is to the left of the white house.
5. The owner of the green house drinks coffee.
6. The person who smokes Pall-Mall has a bird.
7. The owner of the yellow house smokes Dunhill.
8. The one who lives in the center house drinks milk.
9. The Norwegian lives in the first house.
10. The person who Blends lives next to the one who has a cat.
11. The person who owns a horse lives next to the one who smokes Dunhill.
12. The one who smokes Bluemasters drinks beer.
13. The German smokes Prince.
14. The Norwegian lives next to the blue house.
15. When you smoke Blends you have a neighbor who drinks water.

I hope you find it interesting.

A clarification, it has no cheat or tricks, it is just a matter of thinking and relating.

Have fun!