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

generates a code of length 56 over Z8 who´s minimum homogenous weight is 54.

Homogenous weight enumerator: w(x)=1x^0+48x^54+158x^56+48x^58+1x^112

The gray image is a code over GF(2) with n=224, k=8 and d=108.
This code was found by Heurico 1.16 in 0.0967 seconds.