The generator matrix

 1  1  1  1  2  2  2  1  1  1  1  2  2  2  1  1  1  1
 0  2  0  2  0  2  2  0  0  2  6  4  2  6  4  4  0  0
 0  0  2  2  2  2  0  0  6  2  0  2  2  0  2  2  0  0
 0  0  0  4  0  0  0  0  0  0  0  0  0  4  4  4  0  0
 0  0  0  0  4  0  0  0  0  0  0  0  4  4  4  0  0  0
 0  0  0  0  0  4  0  0  0  0  0  0  4  0  4  4  0  0
 0  0  0  0  0  0  4  0  0  0  0  4  4  0  0  4  0  0
 0  0  0  0  0  0  0  4  0  0  0  4  4  0  4  0  0  0
 0  0  0  0  0  0  0  0  4  0  0  4  0  4  0  4  0  0
 0  0  0  0  0  0  0  0  0  4  0  4  0  0  4  4  0  0
 0  0  0  0  0  0  0  0  0  0  4  4  0  4  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+113x^8+144x^10+931x^12+2752x^14+6123x^16+12640x^18+6123x^20+2752x^22+931x^24+144x^26+113x^28+1x^36

The gray image is a code over GF(2) with n=72, k=15 and d=16.
This code was found by Heurico 1.16 in 1.79 seconds.