1 3 5 9
9 3 4 5
1 2
2 6 3 5
2 7
7 6 5 9
6 5
6 8 5 4
4 1 8 2
21-11-2020.......medium 21-11-2020
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6 8 1 3 4 5 9 7 2
9 2 3 8 6 7 4 5 1
4 5 7 9 1 2 8 3 6
8 1 9 7 2 6 3 4 5
2 3 5 4 8 1 6 9 7
7 4 6 5 9 3 1 2 8
1 9 2 6 5 4 7 8 3
3 6 8 2 7 9 5 1 4
5 7 4 1 3 8 2 6 9
1=>(2,9) | 7=>(2,6) | 9=>(3,4) | 2=>(7,3) | 9=>(4,3) | 7=>(4,4) | 2=>(8,4) | 4=>(7,6) |

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

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

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

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

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

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