The generator matrix

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

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+106x^33+160x^36+418x^39+778x^42+538x^45+64x^48+88x^51+30x^54+4x^57

The gray image is a linear code over GF(3) with n=63, k=7 and d=33.
This code was found by Heurico 1.16 in 0.278 seconds.