2 Commit A - merge B and C
30 Commit B - merge Q and R
34 Commit Q - merge S and T
44 Commit S - merge X and Y
50 Commit X - merge 2 and 3
64 Commit 2 - merge 0 and a
70 Commit c - merge d and 0
78 Commit 0 - merge h and i
106 Commit h - merge t and u