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

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

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

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

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

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

7=>(9,6) |