The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  X  1  1
 0  3  0  0  0  0  3  6  6  0  0  3  3  3  3  3  0  6  0  6  3
 0  0  3  0  0  3  6  0  6  0  3  3  6  6  3  3  3  3  3  6  6
 0  0  0  3  0  6  6  3  0  3  3  0  0  3  3  3  3  0  6  0  6
 0  0  0  0  3  6  6  6  6  6  0  6  0  0  6  0  6  0  6  3  6

generates a code of length 21 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 36.

Homogenous weight enumerator: w(x)=1x^0+86x^36+26x^39+162x^40+1496x^42+324x^43+38x^45+20x^48+14x^51+10x^54+8x^57+2x^60

The gray image is a code over GF(3) with n=189, k=7 and d=108.
This code was found by Heurico 1.16 in 0.0445 seconds.