The generator matrix

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

generates a code of length 48 over Z3[X]/(X^2) who´s minimum homogenous weight is 91.

Homogenous weight enumerator: w(x)=1x^0+36x^91+66x^92+242x^93+48x^94+42x^95+28x^96+48x^97+16x^99+42x^101+112x^102+24x^103+12x^104+2x^105+6x^106+4x^117

The gray image is a linear code over GF(3) with n=144, k=6 and d=91.
This code was found by Heurico 1.16 in 0.0823 seconds.