The generator matrix

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

generates a code of length 19 over Z8 who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+18x^18+32x^19+6x^20+4x^22+1x^24+2x^26

The gray image is a code over GF(2) with n=76, k=6 and d=36.
This code was found by Heurico 1.16 in 0.00301 seconds.