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