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#12
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![]() r1: 5 2 7 1
r2: 7 2 4 1 r3: 5 9 3 7 r4: 6 4 7 8 r5: 6 8 10 11 r6: 2 8 4 9 r7: 5 6 2 4 r8: 4 8 7 9 r9: 8 6 9 11 r10: 6 7 8 9 |