1.  50
 2.  49
 3.  48
 4.  46
 5.  46
 6.  45
 7.  45
 8.  43
=== cut between A and B
 9.  41
10.  41
11.  40
12.  39
13.  39
14.  36
15.  35
16.  35
17.  35
18.  34
19.  32
20.  31
=== cut between B and C
21.  26
22.  26
23.  26
24.  24
25.  23
26.  22
27.  21
=== cut between C and D
28.  20
29.  17
=======================