6 5 8 9
5 9 1 4
3 1
8 1 6 5
1 7
9 3 7 6
6 4
2 6 9 7
4 2 5 8
17-11-2020.......medium 17-11-2020
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6 1 4 5 3 8 7 2 9
7 5 2 9 6 1 8 4 3
9 8 3 4 7 2 1 5 6
3 7 8 1 2 6 5 9 4
1 6 5 8 9 4 2 3 7
2 4 9 3 5 7 6 8 1
5 9 6 7 8 3 4 1 2
8 2 1 6 4 9 3 7 5
4 3 7 2 1 5 9 6 8
6=>(5,2) | 4=>(6,2) | 3=>(7,6) | 3=>(8,7) | 4=>(8,5) | 6=>(9,8) | 4=>(1,3) | 3=>(4,1) |

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

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

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

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

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

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