The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  1  1  2
 0  4  0  0  0  0  0  0  0  0  0  0  0  0  4  0  4  4
 0  0  4  0  0  0  0  0  0  0  0  0  0  0  4  4  0  4
 0  0  0  4  0  0  0  0  0  0  0  0  0  4  0  4  4  0
 0  0  0  0  4  0  0  0  0  0  0  0  0  4  0  0  4  4
 0  0  0  0  0  4  0  0  0  0  0  0  0  4  0  4  0  4
 0  0  0  0  0  0  4  0  0  0  0  0  4  4  4  4  4  0
 0  0  0  0  0  0  0  4  0  0  0  0  4  0  0  0  4  4
 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  0  0  4  0  4
 0  0  0  0  0  0  0  0  0  0  4  0  4  4  4  0  0  0
 0  0  0  0  0  0  0  0  0  0  0  4  4  4  4  0  4  4

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

Homogenous weight enumerator: w(x)=1x^0+126x^8+532x^12+2404x^16+10240x^18+2392x^20+602x^24+84x^28+3x^32

The gray image is a code over GF(2) with n=72, k=14 and d=16.
This code was found by Heurico 1.16 in 0.695 seconds.