The generator matrix

 1  0  0  0  1  1  1  6  1  1  1  1  3  3  3  1  1  1  1  3
 0  1  0  0  6  1  7  1  0  6  4  4  1  1  1  5  8  7  3  6
 0  0  1  0  7  1  5  7  6  2  4  5  3  5  6  1  8  6  6  1
 0  0  0  1  5  3  8  2  4  2  5  1  4  2  5  1  2  6  5  2

generates a code of length 20 over Z9 who´s minimum homogenous weight is 33.

Homogenous weight enumerator: w(x)=1x^0+468x^33+1222x^36+1806x^39+1890x^42+1054x^45+120x^48

The gray image is a code over GF(3) with n=60, k=8 and d=33.
This code was found by Heurico 1.16 in 0.642 seconds.