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#5
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r1: 2 7 5 1
r2: 3 8 9 2 r3: 6 3 1 5 r4: 2 7 10 1 r5: 1 4 2 3 r6: 7 4 9 3 r7: 9 12 4 1 r8: 1 3 2 5 r9: 2 5 7 8 r10: 2 1 5 6 r11: 6 7 8 12 |