Once upon a time, in a land far from here, in time and place, there was a man. And this man was perfect. Of course, he thought that life would be more pleasant if he had a perfect wife by his side.
So, one day he found a young woman and fell in love with her. They married, and it was really a perfect wedding. In their marriage the perfect man found out that he had met the perfect wife, and, of course he was happy. They led the most perfect life one could think of.
Until one day, and a stormy winter day it was. The roads, the towns and the fields were covered with snow, in fact, everything was covered with snow. They were driving along a road heading towards home late on Christmas Eve. It was almost midnight when they discovered, just behind one of the many bends of the road, a figure with a long white beard clad in a large red coat with a big red hood. He was carrying a big sack on his back which seemed to be very heavy.
Who was it?

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