What is the four-digit number (no zeros) in which the third digit is the number of "winds", the first digit is one-half of the third, the second digit is double the third and the last digit is one-half the sum of the first three?

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What is the four-digit number (no zeros) in which the third digit is the number of "winds", the first digit is one-half of the third, the second digit is double the third and the last digit is one-half the sum of the first three?

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