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Put one digit from 1–9 in each square of this Sudoku so that the following two conditions are met: 1) each row, column, and 3-x-3 box (as marked by shading in the grid) contains the digits 1–9 exactly one time, and 2) the sums of the numbers in each area marked off by heavy black lines total the little number given in each of those areas. For example, the digits in the upper-leftmost square in the grid and the square directly beneath it will add up to 10. Now get to solving!