SUDOKU

Write a number from 1 to 9 into each empty square in the grid so that every number from 1 to 9 appears exactly once in each horizontal row, each vertical column, and each 3×3 block.
  39      82  
4            95
6      8      3
      5  2      
    4  7  1    
      8          
5      4      8
21          74
  48      36  
* Easy