None of the other animals on the farm could get further than the letter A. It was also found that the stupider animals, such as the sheep, hens, and ducks, were unable to learn the Seven Commandments by heart. After much thought Snowball declared that the Seven Commandments could in effect be reduced to a single maxim, namely: "Four legs good, two legs bad." This, he said, contained the essential principle of Animalism. Whoever had thoroughly grasped it would be safe from human influences. The birds at first objected, since it seemed to them that they also had two legs, but Snowball proved to them that this was not so.