The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  X  X  1  1  1  1  1  X  X  X  1  X  X  X  X  6  6  0  6
 0  6  3  0  6  3  0  6  3  0  6  3  0  6  3  0  6  3  0  6  3  6  3  0  6  3  0  6  6  3  0  3  0  6  3  0  6  3  6  0

generates a code of length 40 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 81.

Homogenous weight enumerator: w(x)=1x^0+80x^81

The gray image is a code over GF(3) with n=360, k=4 and d=243.
This code was found by Heurico 1.16 in 0.014 seconds.