The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  X  1
 0  X 2X  0 X+6 2X  0 X+6 2X  3 X+6 2X+3 X+6  0  3  X X+3  3  0 X+6
 0  0  3  0  0  0  3  6  3  3  0  6  0  6  3  6  3  0  0  6
 0  0  0  3  0  3  3  6  3  0  0  3  3  3  3  3  0  6  3  0
 0  0  0  0  6  6  3  6  6  3  3  6  6  3  0  6  0  6  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+118x^33+84x^34+222x^36+138x^37+162x^38+322x^39+4422x^40+324x^41+306x^42+132x^43+194x^45+78x^46+36x^48+6x^49+8x^51+6x^54+2x^57

The gray image is a code over GF(3) with n=180, k=8 and d=99.
This code was found by Heurico 1.16 in 0.06 seconds.