The generator matrix

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

generates a code of length 21 over Z8 who´s minimum homogenous weight is 16.

Homogenous weight enumerator: w(x)=1x^0+73x^16+120x^17+472x^18+264x^19+1008x^20+272x^21+984x^22+240x^23+446x^24+120x^25+72x^26+8x^27+8x^28+8x^30

The gray image is a code over GF(2) with n=84, k=12 and d=32.
This code was found by Heurico 1.16 in 0.117 seconds.