The generator matrix

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

generates a code of length 18 over Z8 who´s minimum homogenous weight is 13.

Homogenous weight enumerator: w(x)=1x^0+62x^13+145x^14+234x^15+503x^16+736x^17+767x^18+724x^19+492x^20+222x^21+111x^22+66x^23+28x^24+4x^25+1x^26

The gray image is a code over GF(2) with n=72, k=12 and d=26.
This code was found by Heurico 1.16 in 0.161 seconds.