1 2 4 9
4 8 7
5 9 8
6 3 2
4 6
9 1 5
5 3 7
8 7 1
3 2 5 8
19-05-2018.......easy 19-05-2018
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1 7 6 5 2 3 8 4 9
4 3 2 8 7 9 1 5 6
5 9 8 1 4 6 2 7 3
7 8 5 6 9 4 3 1 2
2 4 3 7 1 8 9 6 5
9 6 1 2 3 5 7 8 4
8 1 4 9 6 2 5 3 7
6 5 9 3 8 7 4 2 1
3 2 7 4 5 1 6 9 8
5=>(1,4) | 8=>(1,7) | 2=>(5,1) | 6=>(8,1) | 2=>(2,3) | 9=>(2,6) | 1=>(7,2) | 6=>(6,2) |

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

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

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

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

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

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