The generator matrix

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

generates a code of length 18 over Z3[X]/(X^2) who´s minimum homogenous weight is 33.

Homogenous weight enumerator: w(x)=1x^0+84x^33+94x^36+36x^39+24x^42+4x^45

The gray image is a linear code over GF(3) with n=54, k=5 and d=33.
This code was found by Heurico 1.16 in 0.00109 seconds.