--This file was prepared by Federico Galetto using Macaulay2. Contact the author at galetto.federico [(AT)] gmail.com for questions, comments or bug reports. A=QQ[x_111, x_112, x_113, x_121, x_122, x_123, x_131, x_132, x_133, x_211, x_212, x_213, x_221, x_222, x_223, x_231, x_232, x_233] 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