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1
1
x4
x1
x2
x2
x6
x4
x4
x2
x1
x1
x2
x2
x2
x2
2 3x4
x2
x4
2
4x2
x4
x2
x4
x2
x2
x1
x1
x1
x1
5 6x2
x4
x2
x2
x2 x2
54
7
x2
x2
x2
8
x6
x4
x2
x1
x1
x1
x2
3
859x2
x2
x2
10x2
x2
x4
x2
x2
x2
12x2
x2
x2
11x2
x2
x4
x2
x2
x1
4
x2
x6
x2
x2
14 1312
x4
x4
13x4
5
15x4
x4
x2
x2
16
x2
x2
17x2
x2
x2
1615
x2
x2
x2
18 1713
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