This is a quote from the book "Animal Farm" by George Orwell
...

It was a pig walking on his hind legs.

Yes, it was Squealer. A little awkwardly, as though not quite used to supporting his considerable bulk in that position, but with perfect balance, he was strolling across the yard. And a moment lat er, out from the door of the farmhouse came a long file of pigs, all walking on their hind legs. Some did it better than others, one or two were even a trifle unsteady and looked as though they would ...

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