The generator matrix

 1  0  1  1  1  1  1 X+6  1  1  1 2X  1  1  1  1  1  1  1  1  1
 0  1 2X+7  8 X+6 X+1 X+5  1 2X 2X+8  7  1 X+1  7 2X+7  0 X+6  7 2X+7  0  3
 0  0  6  0  6  3  3  3  0  0  3  0  3  6  6  0  3  6  3  6  6
 0  0  0  3  6  6  3  0  3  6  0  6  3  0  6  6  0  3  0  0  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+62x^36+108x^37+156x^38+308x^39+1272x^40+480x^41+596x^42+2538x^43+468x^44+396x^45+126x^46+24x^47+4x^48+6x^49+6x^50+2x^51+6x^54+2x^60

The gray image is a code over GF(3) with n=189, k=8 and d=108.
This code was found by Heurico 1.16 in 0.0343 seconds.