The generator matrix

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

generates a code of length 12 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+498x^18+1458x^20+1668x^21+7290x^22+5832x^23+19422x^24+14580x^25+5832x^26+2264x^27+204x^30

The gray image is a code over GF(3) with n=108, k=10 and d=54.
This code was found by Heurico 1.16 in 1 seconds.