Goed: 6x6=36, 7x6=42, 8x6=48, 9x6=54, 7x7=49, 8x7=56, 9x7=63, 8x9=72, 9x9=81, 7x9=63, 6x7=42, 5x6=30, Fout: 7x6=40, 8x6=46, 9x6=53, 7x7=47, 8x7=57, 9x7=73, 8x9=71, 6x6=66,

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