The generator matrix

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

generates a code of length 20 over Z3[X]/(X^2) who´s minimum homogenous weight is 33.

Homogenous weight enumerator: w(x)=1x^0+492x^33+1152x^36+1824x^39+1986x^42+996x^45+84x^48+24x^51+2x^54

The gray image is a linear code over GF(3) with n=60, k=8 and d=33.
This code was found by Heurico 1.16 in 2.45 seconds.