The generator matrix

 1  0  1  1  1  1  1  1  1  0  1  1  1  1  0  1  1  1  1  X  1  1  1  1  X  1  1  X  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 a*X  X a*X a*X  0  X  X
 0  1  1  a a^2*X+a^2  0 a^2*X+1  a a^2*X+a^2  1  0  a a^2*X+1 a^2*X+a^2  1  X a^2*X+1 X+a a*X+a^2  1  X  1 X+a a*X+a^2  1  X a*X+1  1  0 a^2*X+a a*X+a^2 a^2*X+1 X+a  X a*X X+1 X+a a*X+1 a^2*X+a^2  1 a*X+1 a^2*X+a  1 a*X+1  1 a^2*X+a X+a^2  a a^2*X+a  a a*X+1 X+a a^2*X+1 a*X+a a^2*X+a X+a^2 a^2 a*X+a^2 a^2*X+a^2 a*X+a^2 X+a^2 X+a^2 X+a^2  X  0 a*X  0 a*X  X a*X  1  1  1  1  1  1  X  1
 0  0 a^2*X  0  X  0  X a*X a*X a*X a*X  X a^2*X a^2*X  0 a^2*X  0 a^2*X  0  X  X a*X a*X  X a^2*X a*X  X a*X a^2*X  X  0  X  X a^2*X  0 a^2*X a*X a^2*X  X a*X a*X  0  0  X  0 a^2*X  0  0 a^2*X a*X a*X a^2*X  0  X  0 a*X a^2*X a^2*X a*X  X a^2*X  0 a*X  X  0 a^2*X  X a*X a*X  X a*X  0  X  X a^2*X a^2*X  0 a*X
 0  0  0  X a*X a*X  0 a*X  X  X  0  X a*X  X  X  0  0  X  X  X  0  0  X  X  X a*X a*X  0 a*X a*X a*X  X a^2*X a^2*X a^2*X  X a^2*X a^2*X  0 a^2*X  X a^2*X  X a^2*X a^2*X a^2*X  0 a*X a*X  0 a*X  0 a*X  0  0 a*X a*X a^2*X  0 a^2*X  0 a^2*X a^2*X a*X  X  X  X  X a^2*X a^2*X a^2*X a^2*X a*X a^2*X a*X a^2*X  0 a*X

generates a code of length 78 over F4[X]/(X^2) who´s minimum homogenous weight is 227.

Homogenous weight enumerator: w(x)=1x^0+816x^227+264x^228+1152x^231+396x^232+336x^235+144x^236+12x^240+336x^243+168x^244+384x^247+36x^248+48x^251+3x^256

The gray image is a linear code over GF(4) with n=312, k=6 and d=227.
This code was found by Heurico 1.16 in 80.5 seconds.