The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+474x^33+1226x^36+1746x^39+1974x^42+1028x^45+108x^48+4x^54

The gray image is a code over GF(3) with n=60, k=8 and d=33.
This code was found by Heurico 1.13 in 4.75 seconds.