The generator matrix

 1  0  1  1  1  1  1 X+3  1  1  1  0 X+3  6  1 X+6  1  1
 0  1 2X+4  8 X+1 X+3 X+2  1 2X  4 X+2  1  1  1  8  1 X+5  5
 0  0  3  0  6  3  6  6  0  3  0  6  0  3  3  3  3  0

generates a code of length 18 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 33.

Homogenous weight enumerator: w(x)=1x^0+270x^33+324x^34+688x^36+648x^37+234x^39+18x^42+4x^45

The gray image is a code over GF(3) with n=162, k=7 and d=99.
This code was found by Heurico 1.16 in 0.995 seconds.