The generator matrix

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

generates a code of length 54 over Z8 who´s minimum homogenous weight is 46.

Homogenous weight enumerator: w(x)=1x^0+134x^46+16x^47+287x^48+72x^49+379x^50+176x^51+470x^52+264x^53+588x^54+240x^55+503x^56+152x^57+314x^58+80x^59+213x^60+24x^61+98x^62+48x^64+19x^66+12x^68+4x^70+1x^72+1x^76

The gray image is a code over GF(2) with n=216, k=12 and d=92.
This code was found by Heurico 1.16 in 3.16 seconds.