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  X  1  1  1  1  1  1  1  1
 0  X  0  X  0  0 X^2+X X^2+X  0  0  X X^2+X  0  0 X^2+X X^2+X X^2  X  0  X X^2  X X^2  X  0  X X^2 X^2+X X^2  X X^2  X  0 X^2  0 X^2+X  X X^2  X X^2+X X^2+X  0 X^2+X X^2 X^2+X X^2 X^2+X  X  X X^2+X  0 X^2 X^2  X X^2 X^2
 0  0  X  X  0 X^2+X X^2+X  0  0 X^2+X  X  0  0  X X^2+X  0  X X^2 X^2  X  0 X^2+X  X X^2 X^2  X  X X^2  0 X^2+X X^2+X X^2  X X^2 X^2  0  0 X^2+X X^2+X X^2+X X^2  X  X X^2  X X^2 X^2 X^2+X  0 X^2 X^2 X^2+X  0  0  X  X
 0  0  0 X^2  0  0 X^2  0 X^2 X^2  0 X^2 X^2 X^2  0 X^2  0 X^2 X^2  0 X^2  0  0 X^2  0 X^2 X^2  0  0 X^2 X^2  0  0  0 X^2  0 X^2 X^2 X^2  0 X^2 X^2  0  0 X^2 X^2  0  0  0 X^2  0  0  0 X^2  0  0
 0  0  0  0 X^2 X^2 X^2 X^2 X^2 X^2  0 X^2  0  0 X^2  0 X^2  0  0 X^2 X^2  0  0 X^2 X^2 X^2  0  0  0  0 X^2 X^2 X^2 X^2 X^2  0  0  0 X^2  0 X^2 X^2 X^2  0  0  0 X^2 X^2 X^2  0  0 X^2 X^2 X^2 X^2  0

generates a code of length 56 over Z2[X]/(X^3) who´s minimum homogenous weight is 52.

Homogenous weight enumerator: w(x)=1x^0+27x^52+20x^53+24x^54+112x^55+155x^56+104x^57+20x^58+16x^59+25x^60+4x^61+3x^62+1x^110

The gray image is a linear code over GF(2) with n=224, k=9 and d=104.
This code was found by Heurico 1.16 in 0.103 seconds.