The generator matrix

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

generates a code of length 21 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 40.

Homogenous weight enumerator: w(x)=1x^0+78x^40+264x^41+92x^42+156x^43+132x^44+2x^45+2x^48+2x^54

The gray image is a code over GF(3) with n=189, k=6 and d=120.
This code was found by Heurico 1.16 in 0.00158 seconds.