The generator matrix

 1  1  1  1  1  1  1  1  1  1  1
 0  X 2X  0 X+6  3 X+6  3 X+3 2X  0
 0  0  3  3  6  6  3  3  0  0  0

generates a code of length 11 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+28x^18+30x^20+48x^21+540x^22+12x^23+40x^24+12x^26+16x^27+2x^33

The gray image is a code over GF(3) with n=99, k=6 and d=54.
This code was found by Heurico 1.16 in 0.000766 seconds.