2 5
2 9
1 9 5 6 3
3 9 6 5
4 7
8 4 3 2
9 5 2 4 1
7 2
8 6
16-11-2019.......medium 16-11-2019
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2 6 8 3 9 7 4 1 5
4 7 3 2 1 5 6 8 9
1 9 5 8 6 4 3 2 7
3 2 7 9 8 6 1 5 4
9 4 6 5 2 1 8 7 3
5 8 1 4 7 3 9 6 2
6 3 9 7 5 8 2 4 1
7 1 4 6 3 2 5 9 8
8 5 2 1 4 9 7 3 6
4=>(2,1) | 6=>(7,1) | 5=>(2,6) | 2=>(3,8) | 5=>(5,4) | 3=>(5,9) | 5=>(6,1) | 7=>(3,9) |

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

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

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

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

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

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