2 4 8
6 7 2
2 7 3
9 8 4 5
3 4 5 1
5 2 7 8
6 8 7
7 5 2
1 8 9
12-12-2017.......difficile 12-12-2017
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5 2 7 1 4 3 6 8 9
8 9 3 6 5 7 1 2 4
1 4 6 8 2 9 5 7 3
9 6 1 2 3 8 4 5 7
7 3 8 4 6 5 9 1 2
4 5 2 7 9 1 3 6 8
6 8 5 9 7 4 2 3 1
3 7 9 5 1 2 8 4 6
2 1 4 3 8 6 7 9 5
2=>(9,1) | 6=>(4,2) | 5=>(2,5) | 8=>(3,4) | 4=>(2,9) | 2=>(4,4) | 3=>(9,4) | 4=>(6,1) |

8=>(8,7) | 3=>(8,1) | 9=>(2,2) | 4=>(3,2) | 3=>(1,6) | 3=>(4,5) | 7=>(4,9) | 1=>(4,3) |

3=>(2,3) | 1=>(2,7) | 7=>(9,7) | 8=>(2,1) | 8=>(5,3) | 7=>(5,1) | 7=>(1,3) | 6=>(3,3) |

3=>(7,8) | 9=>(8,3) | 4=>(7,6) | 6=>(8,9) | 4=>(9,3) | 5=>(9,9) | 5=>(1,1) | 9=>(1,9) |

5=>(7,3) | 5=>(3,7) | 1=>(8,5) | 9=>(6,5) | 2=>(7,7) | 9=>(7,4) | 1=>(7,9) | 1=>(1,4) |

1=>(3,1) | 9=>(3,6) | 2=>(5,9) | 9=>(5,7) | 1=>(6,6) |