0
1
Added left
x
2
3
4
Added right
y
5
6
7
Changed same
8a
9
10
Changed different
12b
13
14
Deleted left
17
18
Deleted right
20
21
Left: Add+change Right: change
xx
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
40a
41a
42
Left: Add+change Right: change same
xxxx
43a
44
45
Left: change same Right: add+change
yyyy
46a
47
48
Left: change Right: deleted block
52
Added different
xxxxx
yyyyy
53
54
55
Left mixed change
57x
59
60
Right mixed change
61x
63x
64
65
Both added multiple
xx1
xx2
yy1
yy2
66
67