0
1
Added left
2
3
4
Added right
y
5
6
7
Changed same
8a
9
10
Changed different
12b
13
14
Deleted left
16
17
18
Deleted right
20
21
Left: Add+change Right: change
22b
23
24
Left: change Right add+change
yy
25b
26
27
Left: Delete  Right: change
28a
29
30
Left: change  Right: delete
32
33
Added same
xxx
34
35
36
Deleted same
38
39
Changed adjacent
40
41a
42
Left: Add+change Right: change same
43a
44
45
Left: change same Right: add+change
yyyy
46a
47
48
Left: change Right: deleted block
52
Added different
yyyyy
53
54
55
Left mixed change
56
57
58
59
60
Right mixed change
61x
63x
64
65
Both added multiple
yy1
yy2
66
67