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#4
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![]() r3: 7 1 4 3
r4: 1 2 5 3 r5: 3 5 2 1 r6: 3 8 1 4 r7: 2 8 9 1 r8: 5 8 1 2 r9: 10 7 2 3 r10: 8 7 2 1 r11: 8 9 3 5 r12: 8 5 10 3 |