The generator matrix

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

generates a code of length 18 over Z8 who´s minimum homogenous weight is 12.

Homogenous weight enumerator: w(x)=1x^0+52x^12+16x^13+212x^14+208x^15+573x^16+544x^17+880x^18+544x^19+600x^20+208x^21+180x^22+16x^23+50x^24+8x^26+4x^28

The gray image is a code over GF(2) with n=72, k=12 and d=24.
This code was found by Heurico 1.16 in 0.0844 seconds.