The generator matrix

 1  0  1  1  1  1  1  0  1  X  1  1  1  1 2X+3  1  1  1 X+3  X  1
 0  1  1  8 2X+4 X+3  2  1  3  1 2X+1 X+2 2X+3 X+2  1 2X+4  0  8  1  0 2X+2
 0  0 2X  0  3  3 X+3 2X+3 X+6  X X+6 2X+3 X+3  6 X+6 2X+6 2X+3 2X  3 2X X+3
 0  0  0  6  3  6  3  0  3  0  6  0  0  3  3  6  0  6  3  3  6

generates a code of length 21 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 36.

Homogenous weight enumerator: w(x)=1x^0+236x^36+324x^37+912x^38+1164x^39+2028x^40+3144x^41+3118x^42+3474x^43+3132x^44+1468x^45+414x^46+96x^47+84x^48+78x^49+6x^50+2x^51+2x^54

The gray image is a code over GF(3) with n=189, k=9 and d=108.
This code was found by Heurico 1.16 in 0.29 seconds.