The generator matrix

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

generates a code of length 21 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 33.

Homogenous weight enumerator: w(x)=1x^0+162x^33+84x^34+228x^36+480x^37+486x^38+360x^39+4152x^40+1944x^41+624x^42+7476x^43+1944x^44+468x^45+870x^46+228x^48+60x^49+78x^51+32x^54+6x^57

The gray image is a code over GF(3) with n=189, k=9 and d=99.
This code was found by Heurico 1.16 in 57.5 seconds.