Correct: 1+9, 2+8, 3+7, 4+6, 5+5, 0+10, 10+0, 9+1, 8+2, 7+3, 6+4, , , , , , Incorrect: 1+7, 2+6, 3+5, 4+8, 5+7, 6+6, 7+5, 8+4, 9+3, 11, 9, 0, 1, , , ,

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