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20+ 2 - 22, 21+ 2 - 23, 22+ 2 - 24, 25 + 1 - 26, 23 + 5 - 28, 26- 1 - 25, 28- 1 - 27, 31- 1 - 30, 24- 3 - 21, 25- 5 - 20,

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