The generator matrix

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

generates a code of length 35 over Z2[X]/(X^3) who´s minimum homogenous weight is 28.

Homogenous weight enumerator: w(x)=1x^0+111x^28+352x^30+594x^32+994x^34+1053x^36+578x^38+236x^40+118x^42+51x^44+6x^46+1x^48+1x^52

The gray image is a linear code over GF(2) with n=140, k=12 and d=56.
This code was found by Heurico 1.16 in 0.568 seconds.