---+-----+-----
 1 | 1   |{10}
---+-----+-----
 2 |{11} |{22}
---+-----+-----
 3 | 23  | 39
---+-----+-----
 4 |{40} |{60}
---+-----+-----
 5 |{61} | 70
---+-----+-----
 6 |{71} |{77}
---+-----+-----
 7 |{78} | 82
---+-----+-----
 8 | 83  |{100}
---+-----+-----
 9 | 101 | 104
---+-----+-----
10 | 105 |{111}
---+-----+-----