The generator matrix

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

generates a code of length 21 over Z8 who´s minimum homogenous weight is 19.

Homogenous weight enumerator: w(x)=1x^0+18x^19+33x^20+28x^21+23x^22+18x^23+6x^24+1x^34

The gray image is a code over GF(2) with n=84, k=7 and d=38.
This code was found by Heurico 1.16 in 0.00172 seconds.