The generator matrix

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

generates a code of length 36 over Z8 who´s minimum homogenous weight is 28.

Homogenous weight enumerator: w(x)=1x^0+102x^28+288x^29+726x^30+1166x^31+1827x^32+2634x^33+3253x^34+4134x^35+4364x^36+4066x^37+3612x^38+2710x^39+1830x^40+1070x^41+492x^42+266x^43+130x^44+38x^45+42x^46+12x^47+2x^48+3x^50

The gray image is a code over GF(2) with n=144, k=15 and d=56.
This code was found by Heurico 1.16 in 14.8 seconds.