The generator matrix

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

generates a code of length 26 over Z8 who´s minimum homogenous weight is 20.

Homogenous weight enumerator: w(x)=1x^0+38x^20+128x^21+144x^22+366x^23+355x^24+792x^25+481x^26+790x^27+339x^28+352x^29+129x^30+122x^31+32x^32+8x^33+11x^34+2x^35+3x^36+3x^38

The gray image is a code over GF(2) with n=104, k=12 and d=40.
This code was found by Heurico 1.16 in 0.195 seconds.