The generator matrix

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

generates a code of length 39 over Z8 who´s minimum homogenous weight is 28.

Homogenous weight enumerator: w(x)=1x^0+145x^28+418x^30+1296x^32+2500x^34+4920x^36+6888x^38+7365x^40+4952x^42+2665x^44+994x^46+452x^48+116x^50+46x^52+4x^54+5x^56+1x^64

The gray image is a code over GF(2) with n=156, k=15 and d=56.
This code was found by Heurico 1.16 in 27.3 seconds.