+-----+-----+-----+-----+-----+-----+-----+-----+-----+
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|  1  |  2  |  4  "  8  |  9  |  7  "  1  |  6  |  3  |
|     |     |     "     |     |     "     |     |     |
+-----+-----+-----+-----+-----+-----+-----+-----+-----+
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|  3  |  6  |  5  "  5  |  2  |  4  "  4  |  5  |  8  |
|     |     |     "     |     |     "     |     |     |
+-----+-----+-----+-----+-----+-----+-----+-----+-----+
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|  9  |  7  |  8  "  3  |  6  |  1  "  7  |  2  |  9  |
|     |     |     "     |     |     "     |     |     |
+=====+=====+=====+=====+=====+=====+=====+=====+=====+
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|  2  |  4  |  9  "  2  |  7  |  8  "  9  |  2  |  3  |
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+-----+-----+-----+-----+-----+-----+-----+-----+-----+
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|  1  |  5  |  7  "  5  |  9  |  6  "  7  |  4  |  6  |
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+-----+-----+-----+-----+-----+-----+-----+-----+-----+
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|  6  |  3  |  8  "  1  |  4  |  3  "  8  |  1  |  5  |
|     |     |     "     |     |     "     |     |     |
+=====+=====+=====+=====+=====+=====+=====+=====+=====+
|     |     |     "     |     |     "     |     |     |
|  8  |  3  |  6  "  1  |  5  |  6  "  5  |  1  |  3  |
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+-----+-----+-----+-----+-----+-----+-----+-----+-----+
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|  9  |  4  |  7  "  4  |  7  |  8  "  8  |  7  |  9  |
|     |     |     "     |     |     "     |     |     |
+-----+-----+-----+-----+-----+-----+-----+-----+-----+
|     |     |     "     |     |     "     |     |     |
|  2  |  5  |  1  "  2  |  9  |  3  "  6  |  2  |  4  |
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+-----+-----+-----+-----+-----+-----+-----+-----+-----+