2
6 + 7 -> 10 (modularity 0.00)
3
2 + 4 -> 11 (modularity -0.07)
4
8 + 10 -> 12 (modularity -0.04)
5
3 + 11 -> 13 (modularity 0.02)
6
9 + 12 -> 14 (modularity 0.08)
7
1 + 13 -> 15 (modularity 0.16)
8
0 + 15 -> 16 (modularity 0.25)
9
5 + 14 -> 17 (modularity 0.35)
10
16 + 17 -> 18 (modularity 0.45)