The generator matrix

 1  0  0  0  1  1  1  0  6  1  0  1  1  6  1  1  6  1  1  0  4  1  1  1  2  1
 0  1  0  0  0  1  1  1  1  3  6  1  6  1  6  2  1  4  3  6  2  3  0  5  2  0
 0  0  1  0  1  1  0  3  0  7  1  2  2  3  1  7  7  5  1  1  0  4  2  2  1  0
 0  0  0  1  1  0  1  3  3  5  7  6  3  0  4  2  6  5  2  7  1  7  7  5  0  0
 0  0  0  0  2  0  0  0  4  6  6  6  2  0  2  4  2  4  6  4  6  4  4  6  4  0
 0  0  0  0  0  4  0  0  4  4  4  4  4  4  4  0  0  4  4  4  0  4  0  0  4  4
 0  0  0  0  0  0  4  4  0  0  4  0  4  4  0  4  0  4  4  0  0  4  4  4  0  4

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

Homogenous weight enumerator: w(x)=1x^0+68x^18+232x^19+775x^20+1426x^21+3059x^22+4972x^23+7495x^24+9666x^25+9895x^26+9916x^27+7632x^28+4950x^29+3068x^30+1364x^31+663x^32+214x^33+100x^34+28x^35+9x^36+1x^38+1x^40+1x^42

The gray image is a code over GF(2) with n=104, k=16 and d=36.
This code was found by Heurico 1.16 in 31 seconds.