Corretto: 5 + 4, 4 + 5, 3 + 6, 6 + 3, 7 + 2, 2 + 7, 1 + 8, 8 + 1, Errato: 5 + 5, 4 + 4, 3 + 7, 7 + 3, 7 + 1, 6 + 2, 2 + 6, 1 + 7,

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