.

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.

"A bird's wing, comrades," he said, "is an organ of propulsion and not of
manipulation. It should therefore be regarded as a leg. The distinguishing
mark of man is the HAND, the instrument with which he does all his
mischief."

The birds did not understand Snowball's long words, but they accepted his
explanation, and all the humbler animals set to work to learn the new
maxim by heart. FOUR LEGS GOOD, TWO LEGS BAD, was inscribed on the end
wall of the barn, above the Seven Commandments and in bigger letters When
they had once got it by heart, the sheep developed a great liking for this
maxim, and often as they lay in the field they would all start bleating
"Four legs good, two legs bad! Four legs good, two legs bad!" and keep it
up for hours on end, never growing tired of it. ~ George Orwell - Animal Farm