Rncn
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The correct title of this article is rncn. The initial letter is shown capitalized due to technical restrictions.
rncn is a system to identify cells using the row and column numbers as coordinates.
Here are all 81 cells in a grid with their rncn identifiers:
+------------------+------------------+------------------+ | r1c1 r1c2 r1c3 | r1c4 r1c5 r1c6 | r1c7 r1c8 r1c9 | | r2c1 r2c2 r2c3 | r2c4 r2c5 r2c6 | r2c7 r2c8 r2c9 | | r3c1 r3c2 r3c3 | r3c4 r3c5 r3c6 | r3c7 r3c8 r3c9 | +------------------+------------------+------------------+ | r4c1 r4c2 r4c3 | r4c4 r4c5 r4c6 | r4c7 r4c8 r4c9 | | r5c1 r5c2 r5c3 | r5c4 r5c5 r5c6 | r5c7 r5c8 r5c9 | | r6c1 r6c2 r6c3 | r6c4 r6c5 r6c6 | r6c7 r6c8 r6c9 | +------------------+------------------+------------------+ | r7c1 r7c2 r7c3 | r7c4 r7c5 r7c6 | r7c7 r7c8 r7c9 | | r8c1 r8c2 r8c3 | r8c4 r8c5 r8c6 | r8c7 r8c8 r8c9 | | r9c1 r9c2 r9c3 | r9c4 r9c5 r9c6 | r9c7 r9c8 r9c9 | +------------------+------------------+------------------+