5 4 9 2 1
6 2 1 8 4
8 4 5
3 4 9 1
7 5
7 1 8 6
4 9 8
9 8 3 6 2
7 4 1 9 5
10-01-2019.......easy 10-01-2019
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5 4 9 3 8 2 7 6 1
3 6 2 1 5 7 8 4 9
8 1 7 9 4 6 5 3 2
6 8 5 2 3 4 9 1 7
9 2 3 7 1 5 4 8 6
4 7 1 8 6 9 2 5 3
2 5 4 6 9 1 3 7 8
1 9 8 5 7 3 6 2 4
7 3 6 4 2 8 1 9 5
8=>(1,5) | 3=>(2,1) | 1=>(8,1) | 1=>(3,2) | 7=>(3,3) | 5=>(2,5) | 2=>(3,9) | 5=>(4,3) |

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

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

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

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

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