The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  2  1  2  4  1  2  0  0  2  2  2  2  4  4  1  4  1  4  4  0  2  2
 0  2  0  0  0  0  0  0  0  2  6  6  6  2  6  2  6  6  2  2  2  0  6  4  0  4  2  0  0  4  2  6  0  2  2  4  2  0  0
 0  0  2  0  0  0  2  6  2  2  2  4  2  6  4  0  6  0  2  6  6  2  4  2  0  4  0  2  6  2  0  2  4  0  2  4  4  2  0
 0  0  0  2  0  2  2  6  0  0  0  4  2  2  2  2  6  2  6  0  6  6  4  2  2  4  2  4  6  4  4  0  2  2  2  2  2  4  0
 0  0  0  0  2  2  0  6  2  0  2  2  4  6  6  4  4  6  6  0  2  2  0  2  0  2  0  2  0  0  2  0  6  4  4  6  2  6  0
 0  0  0  0  0  4  0  0  0  4  4  0  4  4  0  4  0  4  0  4  0  4  4  4  4  0  4  0  0  4  0  0  0  4  0  4  0  0  0
 0  0  0  0  0  0  4  0  0  0  4  4  4  0  0  4  0  4  4  0  0  4  0  4  4  4  0  0  4  4  4  0  4  4  0  4  4  0  0
 0  0  0  0  0  0  0  4  0  4  0  4  4  0  4  4  0  0  4  0  0  4  4  4  4  0  4  4  4  0  4  4  4  0  4  0  0  0  0
 0  0  0  0  0  0  0  0  4  0  0  0  0  0  0  0  0  0  0  4  4  4  4  0  4  0  4  4  0  0  4  0  4  4  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+135x^28+466x^30+68x^31+1183x^32+312x^33+2078x^34+904x^35+3477x^36+1736x^37+4858x^38+2128x^39+4913x^40+1752x^41+3716x^42+952x^43+2142x^44+280x^45+1022x^46+44x^47+398x^48+16x^49+142x^50+37x^52+6x^54+1x^56+1x^60

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 28.5 seconds.