lekahe
Posts: 2734
Joined: 1/22/2005
From: Finland
Status: offline
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According to my interpretation the rows are all different from each other and the columns differ from each other. If the puzzle could not have identity between one row and one column, shoudd we also consider directions? Columns usually are read from top to bottom, but rows can be read from left to right, or vice versa! Leena
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