The generator matrix

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

generates a code of length 20 over Z8 who´s minimum homogenous weight is 13.

Homogenous weight enumerator: w(x)=1x^0+78x^13+212x^14+600x^15+1065x^16+2572x^17+3277x^18+5926x^19+5230x^20+6000x^21+3311x^22+2622x^23+1010x^24+564x^25+203x^26+66x^27+22x^28+2x^29+5x^30+2x^31

The gray image is a code over GF(2) with n=80, k=15 and d=26.
This code was found by Heurico 1.16 in 5.67 seconds.