The generator matrix

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

generates a code of length 20 over Z8 who´s minimum homogenous weight is 16.

Homogenous weight enumerator: w(x)=1x^0+83x^16+246x^17+210x^18+422x^19+188x^20+372x^21+196x^22+212x^23+80x^24+22x^25+10x^26+6x^27

The gray image is a code over GF(2) with n=80, k=11 and d=32.
This code was found by Heurico 1.16 in 0.0367 seconds.