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Challenge 145


Elves in the fireplace

Difficulty level:

Two elves, Santa's helpers, went to deliver presents to a house down the chimney. When they got inside, they looked at each other. One was black-faced with soot, but the other was clean. Without saying a word, the goblin whose face was clean went to wash his face, while the goblin with the dirty face did nothing. How do you explain it?