The generator matrix

 1  0  0  0  1  1  1  X  1 aX  1  1  X  1  1  0  1  1  1  1  1  1  1  1  1  1  X  1  1  1  1  0 aX  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
 0  1  0  0  X  1 X+1  1 (a+1)X  1 (a+1)X+1  0  1 X+1 aX+1  1 aX+a aX+1 a+1 (a+1)X+a+1 aX aX+a X+a (a+1)X (a+1)X+a+1 aX+a+1  1 aX+a+1 (a+1)X+a X+1 X+a  1  1 (a+1)X (a+1)X+a+1  a a+1 (a+1)X+1  a X+1 aX aX+a+1 aX X+a (a+1)X+a a+1 (a+1)X+1 X+a+1  a
 0  0  1  0 (a+1)X+1  1 (a+1)X (a+1)X+1 aX+1  a aX (a+1)X+a aX+1 a+1  a a+1  0 X+a  X (a+1)X (a+1)X+a+1 aX X+a aX+a+1 X+1  1  0 (a+1)X+a (a+1)X aX+1 aX+a (a+1)X+a+1  1  a  X aX+1 aX+a aX+1 (a+1)X+1  0  a aX+a aX+a X+a+1 (a+1)X+1 X+a+1 (a+1)X a+1 X+a
 0  0  0  1 a+1  X aX+a+1 aX+a+1  a aX (a+1)X+a aX (a+1)X+a (a+1)X  1 (a+1)X+1 X+1 X+a+1 X+a (a+1)X+1 aX+1 (a+1)X+a+1 aX+a+1 aX+a  0 aX+a+1 X+a+1 aX+1 (a+1)X a+1  a X+a+1 (a+1)X (a+1)X+1 aX+a+1  0 aX+a X+a X+a  X a+1  0  1 X+1 aX+a+1  X aX+1  1  X

generates a code of length 49 over F4[X,sigma]/(X^2) who´s minimum homogenous weight is 133.

Homogenous weight enumerator: w(x)=1x^0+552x^133+504x^134+636x^135+768x^136+2280x^137+2208x^138+1668x^139+1656x^140+3684x^141+2940x^142+2124x^143+2013x^144+5160x^145+4296x^146+2844x^147+2433x^148+5844x^149+4464x^150+2952x^151+1875x^152+5052x^153+3072x^154+1776x^155+1281x^156+1776x^157+924x^158+288x^159+198x^160+228x^161+24x^162+3x^164+9x^168+3x^172

The gray image is a linear code over GF(4) with n=196, k=8 and d=133.
This code was found by Heurico 1.16 in 12.6 seconds.