The generator matrix

 1  0  0  1  1  1  1  1  1  1  1
 0  1  0  6  1  7  8  0  6  4  7
 0  0  1  7  1  6  2  3  8  4  3

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

Homogenous weight enumerator: w(x)=1x^0+86x^18+42x^19+78x^20+142x^21+78x^22+60x^23+126x^24+42x^25+24x^26+48x^27+2x^30

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 0.00143 seconds.