The generator matrix

 1  0  0  1  1  1  6  1  1  0  0  1  1  2  2  1  1  1
 0  1  0  1  6  3  1  0  1  1  0  2  3  1  0  0  0  0
 0  0  1  1  3  6  3  6  3  6  1  1  0  1  0  0  0  0
 0  0  0  4  0  0  0  0  0  0  0  4  0  4  4  0  0  0
 0  0  0  0  4  0  0  0  0  0  0  4  4  4  0  0  0  0
 0  0  0  0  0  4  0  0  0  0  4  0  4  0  4  0  0  0
 0  0  0  0  0  0  4  0  0  0  4  0  0  4  4  0  0  0
 0  0  0  0  0  0  0  4  0  0  4  4  0  0  4  0  0  0
 0  0  0  0  0  0  0  0  4  0  4  4  0  4  0  0  0  0
 0  0  0  0  0  0  0  0  0  4  0  4  4  0  4  0  0  0

generates a code of length 18 over Z8 who´s minimum homogenous weight is 8.

Homogenous weight enumerator: w(x)=1x^0+109x^8+224x^10+544x^11+1160x^12+1824x^13+2396x^14+4576x^15+6331x^16+9440x^17+12432x^18+9440x^19+5960x^20+4576x^21+2920x^22+1824x^23+759x^24+544x^25+432x^26+16x^28+28x^30

The gray image is a code over GF(2) with n=72, k=16 and d=16.
This code was found by Heurico 1.16 in 3.87 seconds.