The generator matrix

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

generates a code of length 18 over Z9 who´s minimum homogenous weight is 29.

Homogenous weight enumerator: w(x)=1x^0+282x^29+224x^30+786x^32+516x^33+1236x^35+652x^36+1392x^38+620x^39+618x^41+168x^42+60x^44+4x^45+2x^48

The gray image is a code over GF(3) with n=54, k=8 and d=29.
This code was found by Heurico 1.16 in 0.319 seconds.