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Created with Raphaël 2.1.4
6
1
4
x
24, 25
1
1
4
x
23
1
22, 4
4
x
20, 21
1
1
7, 8
1
+
18, 19
2
1
2
1
4
x
17
2
1
16
1
+
15
2
1
14, 4
1
6
1
+
13
1
4
x
11, 12
1
1
+
10
2
1
4
1
+
9
4
x
7, 8
1
1
+
6
1
+
5
2
1
4
x
2, 3
1
2
1
1
+
0
1