1 9 6 4
5 3 4 1
9 7
4 2 8 1 5
8 4 5 7 1
5 9
3 1 9 7
9 5 2 6
21-09-2020.......medium 21-09-2020
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2 8 1 9 7 6 4 5 3
6 5 7 3 2 4 9 1 8
9 4 3 8 1 5 2 6 7
7 9 4 2 8 1 5 3 6
1 2 5 6 9 3 7 8 4
3 6 8 4 5 7 1 9 2
5 1 6 7 4 8 3 2 9
4 3 2 1 6 9 8 7 5
8 7 9 5 3 2 6 4 1
4=>(3,2) | 9=>(2,7) | 1=>(3,5) | 5=>(3,6) | 8=>(3,4) | 5=>(5,3) | 6=>(5,4) | 7=>(7,4) |

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

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

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

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

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

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