The generator matrix

 1  0  1  1  1  6  1  1  0  1  1  0  1  1  1  6  1  6  1  0  1  1  0  6  1  0
 0  1  3  6  1  1  0  3  1  6  5  1  0  5  6  1  3  1  3  1  0  6  1  1  0  1
 0  0  4  0  0  0  0  0  0  0  0  0  0  0  0  4  4  4  4  4  0  0  4  4  4  0
 0  0  0  4  0  0  0  0  0  0  0  0  0  0  4  4  0  4  0  4  4  4  4  4  0  4
 0  0  0  0  4  0  0  0  0  4  0  0  4  4  4  0  4  0  4  0  4  0  4  0  0  0
 0  0  0  0  0  4  0  0  0  4  0  4  4  0  0  4  0  0  4  4  0  4  4  0  4  0
 0  0  0  0  0  0  4  0  0  0  4  0  4  4  0  4  4  0  4  4  4  0  0  0  4  4
 0  0  0  0  0  0  0  4  0  4  4  0  4  0  4  0  4  4  0  4  0  4  4  0  0  0
 0  0  0  0  0  0  0  0  4  4  4  4  4  4  4  4  0  4  4  4  0  0  4  4  4  4

generates a code of length 26 over Z8 who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+33x^18+8x^19+113x^20+104x^21+419x^22+472x^23+1169x^24+952x^25+1658x^26+952x^27+1170x^28+472x^29+422x^30+104x^31+93x^32+8x^33+21x^34+13x^36+7x^38+1x^40

The gray image is a code over GF(2) with n=104, k=13 and d=36.
This code was found by Heurico 1.16 in 87.7 seconds.