The generator matrix

 1  0  0  0  1  1  1  0  1  1  1  1  X  X  X  1  X  0  0  1  0  X  1  1  0  1  1  X  1  1  1  0  1  0  1  0  1  1  X  X  X  1  1  1  1  1  X  1  1  1  1
 0  1  0  0  0  1  1  1  X  0 X+1 X+1  1  1  X  1  1  1  1 X+1  0  1  X  0  0 X+1  1  1  0  0  0  X X+1  0 X+1  1 X+1  X  0  1  1  0  0  X  1  1  1 X+1  X  0  1
 0  0  1  0  1  1  0  1  0 X+1 X+1  X  X X+1  1  X  X X+1  1 X+1  1  0 X+1  0  0  1  0  1 X+1 X+1 X+1  1  X  0  1  0  1  X  1  X  0  0  1  X  1 X+1  1  0  0 X+1 X+1
 0  0  0  1  1  0  1  1  1  0  1  X X+1  0 X+1  1  1 X+1  X  0  X  X X+1  0  1  X  X X+1  0  X X+1  1 X+1  1  0  1  X  X  X X+1  0  0  0  0 X+1 X+1  0  X  0  1 X+1
 0  0  0  0  X  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  X  X  X  X  X  X  X  X  X  X  0  X  0  X  X  X  X  0  X  X  0  X  X  0  X  0  0  X  X
 0  0  0  0  0  X  0  0  0  0  0  0  X  0  0  0  X  0  X  X  X  X  0  X  X  0  X  0  X  X  X  X  X  0  0  0  X  X  X  X  0  X  X  0  X  0  X  X  X  0  0
 0  0  0  0  0  0  X  0  0  0  0  0  0  X  X  X  0  X  0  X  0  0  0  0  X  X  X  0  X  0  0  X  X  X  X  0  X  X  0  X  X  0  X  X  0  0  X  X  X  X  X
 0  0  0  0  0  0  0  X  X  X  0  X  X  X  X  X  0  0  0  X  X  0  X  0  X  X  X  X  0  X  0  0  0  X  0  0  X  X  0  0  X  X  0  0  0  X  X  0  X  X  X

generates a code of length 51 over Z2[X]/(X^2) who´s minimum homogenous weight is 42.

Homogenous weight enumerator: w(x)=1x^0+137x^42+406x^44+466x^46+505x^48+561x^50+562x^52+540x^54+414x^56+267x^58+142x^60+66x^62+16x^64+11x^66+2x^68

The gray image is a linear code over GF(2) with n=102, k=12 and d=42.
This code was found by Heurico 1.16 in 1.73 seconds.