The generator matrix

 1  0  0  1  1  1  1  1  0  1  1  1  1  1  1 2X  1  1  X  0  1
 0  1  0  1  0  2  1  2  1  0 2X+1  1  2 2X  X  1  0 X+2  1  X  0
 0  0  1  2  1  2  1  0  2 X+2 2X  1 2X+2  2 2X+1  X X+2  X 2X+1  1  0
 0  0  0 2X  0 2X  0 2X 2X 2X 2X  X  0  X  0 2X 2X 2X 2X 2X 2X
 0  0  0  0 2X  X  X 2X 2X 2X 2X  0  0 2X  X  0  X  X 2X  0  X

generates a code of length 21 over Z3[X]/(X^2) who´s minimum homogenous weight is 33.

Homogenous weight enumerator: w(x)=1x^0+42x^33+42x^34+120x^35+498x^36+192x^37+270x^38+624x^39+414x^40+384x^41+1174x^42+426x^43+402x^44+904x^45+330x^46+252x^47+364x^48+54x^49+30x^50+26x^51+10x^54+2x^57

The gray image is a linear code over GF(3) with n=63, k=8 and d=33.
This code was found by Heurico 1.16 in 0.13 seconds.