5 9
3 2 4 5
2 7 8 4
8 7 6 1
7 6
2 3 1 8
1 9 6 8
2 6 3 9
6 5
22-07-2017.......hard 22-07-2017
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6 4 5 8 3 7 9 1 2
8 3 9 2 1 4 6 5 7
2 7 1 9 6 5 3 8 4
3 5 8 7 2 6 1 4 9
7 1 4 5 9 8 2 3 6
9 6 2 3 4 1 8 7 5
1 9 3 4 5 2 7 6 8
5 2 7 6 8 3 4 9 1
4 8 6 1 7 9 5 2 3
5=>(8,1) | 8=>(8,5) | 8=>(2,1) | 1=>(8,9) | 7=>(2,9) | 8=>(9,2) | 1=>(1,8) | 2=>(1,9) |

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

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

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

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

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

5=>(7,5) | 9=>(5,5) | 5=>(5,4) |