The generator matrix

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

generates a code of length 57 over Z8 who´s minimum homogenous weight is 50.

Homogenous weight enumerator: w(x)=1x^0+80x^50+100x^51+271x^52+320x^53+354x^54+376x^55+384x^56+452x^57+382x^58+388x^59+254x^60+312x^61+170x^62+96x^63+68x^64+4x^65+26x^66+35x^68+12x^70+10x^72+1x^80

The gray image is a code over GF(2) with n=228, k=12 and d=100.
This code was found by Heurico 1.16 in 0.679 seconds.