The generator matrix

 1  1  1  1  1  1  1  1  1  1  2  0  1  2  0  1  1  1  1  2  0  1  1  1  2  1
 0  2  0  6  0  6  0  6  0  6  6  2  4  6  2  0  6  6  4  6  2  0  6  6  6  0
 0  0  4  0  0  0  0  0  0  0  0  0  0  0  4  4  4  4  0  4  4  4  0  4  0  0
 0  0  0  4  0  0  0  0  0  0  4  4  0  4  4  0  4  0  0  0  0  4  4  4  0  4
 0  0  0  0  4  0  0  0  0  0  4  4  4  0  0  4  0  0  4  4  0  4  4  4  0  4
 0  0  0  0  0  4  0  0  0  4  0  4  0  4  0  4  4  4  4  4  0  0  4  4  0  4
 0  0  0  0  0  0  4  0  0  0  0  4  4  4  4  4  0  4  4  4  4  0  0  4  4  0
 0  0  0  0  0  0  0  4  0  4  4  0  0  4  4  4  4  4  4  0  4  0  4  0  0  0
 0  0  0  0  0  0  0  0  4  0  4  0  4  4  4  0  0  4  0  4  0  0  4  4  0  0

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

Homogenous weight enumerator: w(x)=1x^0+37x^18+12x^19+96x^20+68x^21+186x^22+300x^23+421x^24+644x^25+574x^26+644x^27+412x^28+300x^29+200x^30+68x^31+81x^32+12x^33+21x^34+12x^36+6x^38+1x^40

The gray image is a code over GF(2) with n=104, k=12 and d=36.
This code was found by Heurico 1.16 in 0.303 seconds.