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version()
8.0.36
pk r r2 r3 r4 r5 r6
1 1 0.0000 1.0000 1 0 2
2 2 0.1429 1.1429 2 1 3
3 3 0.2857 1.2857 3 2 4
4 4 0.4286 1.4286 4 3 5
5 5 0.5714 1.5714 5 4 6
6 6 0.7143 1.7143 6 5 7
7 7 0.8571 1.8571 7 6 1
8 8 1.0000 2.0000 1 0 2
9 9 1.1429 2.1429 2 1 3