The generator matrix

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

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+462x^33+1254x^36+1746x^39+1932x^42+1056x^45+108x^48+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 0.157 seconds.