1 7 2 3
5 9
7 9 4 5
4 9 3 6
1 5
5 6 2 1
6 4 7 9
8 7
2 8 3 4
17-10-2020.......medium 17-10-2020
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9 1 4 7 5 2 8 3 6
2 8 5 1 3 6 9 7 4
6 7 3 9 8 4 1 5 2
8 4 9 2 1 5 3 6 7
1 3 2 6 7 9 4 8 5
7 5 6 3 4 8 2 1 9
3 6 1 4 2 7 5 9 8
4 9 8 5 6 1 7 2 3
5 2 7 8 9 3 6 4 1
4=>(1,3) | 5=>(1,5) | 9=>(1,1) | 9=>(8,2) | 3=>(6,4) | 9=>(6,9) | 4=>(8,1) | 2=>(8,8) |

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

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

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

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

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

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