The generator matrix

 1  1  1  1  1  1  1  1  1  3  3
 0  3  0  0  0  3  0  6  6  3  3
 0  0  3  0  0  6  3  0  6  6  3
 0  0  0  3  0  6  3  6  0  3  6
 0  0  0  0  3  3  3  3  6  0  6

generates a code of length 11 over Z9 who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+186x^18+216x^21+216x^24+110x^27

The gray image is a code over GF(3) with n=33, k=6 and d=18.
This code was found by Heurico 1.16 in 0.00121 seconds.