The generator matrix

 1  0  1  1  1  1  1  6  1  1 X+6  1  1  1  1  1  1  0  1  1
 0  1  1  8 2X+7  0  5  1 X+1  X  1 X+5 2X+7  1 X+6  1 X+5  1 2X+7  0
 0  0 2X  0  6 2X+3 X+6 X+3  6  X 2X+3 2X+6 2X+3  X  6 X+3  0 2X+6  3  0
 0  0  0  3  6  0  0  6  0  6  6  3  3  3  3  0  6  0  3  3

generates a code of length 20 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 33.

Homogenous weight enumerator: w(x)=1x^0+28x^33+150x^34+312x^35+830x^36+810x^37+2124x^38+2778x^39+4314x^40+3942x^41+2786x^42+984x^43+372x^44+118x^45+54x^46+54x^47+18x^48+6x^49+2x^54

The gray image is a code over GF(3) with n=180, k=9 and d=99.
This code was found by Heurico 1.16 in 0.278 seconds.