The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  X
 0  X  0  0  0  X  X  X a*X  0  X a*X a*X a*X a*X  0 a^4*X a^2*X  X
 0  0  X  0  0 a^6*X a^5*X a^4*X a^4*X  X a^3*X a^6*X  0  X a^5*X a*X a^3*X  X  0
 0  0  0  X  0  X a^5*X a*X a^3*X a^2*X a^6*X  0 a^5*X  X a*X a^2*X a*X a^4*X  0
 0  0  0  0  X a^6*X a^3*X a*X a^5*X a*X a^2*X a^2*X a^3*X  0 a*X a^4*X a^4*X a^2*X a^4*X

generates a code of length 19 over F8[X]/(X^2) who´s minimum homogenous weight is 104.

Homogenous weight enumerator: w(x)=1x^0+889x^104+2114x^112+3899x^120+28672x^126+6531x^128+200704x^134+9919x^136+6874x^144+2541x^152

The gray image is a linear code over GF(8) with n=152, k=6 and d=104.
This code was found by Heurico 1.16 in 19.1 seconds.