Please enter row 1: 0 0 0 0 0 7 6 4 5
    Please enter row 2: 7 2 0 4 9 0 0 0 1
    Please enter row 3: 0 0 4 0 0 0 7 9 0
    Please enter row 4: 0 0 0 5 0 0 0 0 0
    Please enter row 5: 4 0 9 0 6 0 2 0 3
    Please enter row 6: 0 0 0 0 0 2 0 0 0
    Please enter row 7: 0 3 8 0 0 0 1 0 0
    Please enter row 8: 5 0 0 0 2 8 0 6 9
    Please enter row 9: 2 6 7 9 0 0 0 0 0
    
    Original puzzle: 
    
         |    7|6 4 5 
    7 2  |4 9  |    1 
        4|     |7 9   
    -----+-----+-----
         |5    |      
    4   9|  6  |2   3 
         |    2|      
    -----+-----+-----
      3 8|     |1     
    5    |  2 8|  6 9 
    2 6 7|9    |      
    
    The puzzle was solved successfully:
    
    1 9 3|2 8 7|6 4 5 
    7 2 6|4 9 5|8 3 1 
    8 5 4|1 3 6|7 9 2 
    -----+-----+-----
    3 8 2|5 7 9|4 1 6 
    4 7 9|8 6 1|2 5 3 
    6 1 5|3 4 2|9 7 8 
    -----+-----+-----
    9 3 8|6 5 4|1 2 7 
    5 4 1|7 2 8|3 6 9 
    2 6 7|9 1 3|5 8 4