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Corect: 15+5, 12+8, 13+7, 20+0, 10+10, 11+9, 17+3, 16+4, 14+6, 18+2, Incorect: 13+8, 15+4, 18+0, 12+7, 15+2, 16+3, 17+2, 14+5, 15+3, 13+6,

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