The generator matrix

 1  0  0  0  1  1  1 2X+3  1  3  1  1  1  1 2X+3  1 X+6  1
 0  1  0  0 2X+3  4 2X+1  1  6  1 2X+4 X+1 2X 2X+5  1  1  1  6
 0  0  1  0 2X+4  4 2X+8 X+4 X+3 2X+3 X+2  7  5 X+6 2X+5 X+2 2X+7  3
 0  0  0  1 2X+2 X+3 X+8 X+2  7  1  X 2X+4  8  5  7  1 2X 2X+3

generates a code of length 18 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 28.

Homogenous weight enumerator: w(x)=1x^0+588x^28+690x^29+3940x^30+6894x^31+18816x^32+20504x^33+67524x^34+71070x^35+102582x^36+125862x^37+70860x^38+28116x^39+11880x^40+1812x^41+124x^42+120x^43+48x^44+8x^45+2x^48

The gray image is a code over GF(3) with n=162, k=12 and d=84.
This code was found by Heurico 1.16 in 86.2 seconds.