The generator matrix

 1  0  0  0  1  1  1  2  1  1  1  1  1  1  1 2a  1  1  1  1  1  1  1  1  1 2a  1  1  1  1  1  1  1  1  1 2a+2  1 2a+2  1  1 2a+2  1  1  1  1 2a 2a+2 2a+2  1
 0  1  0  0  2  1  3  1  a 3a+3 3a 2a  0 2a+3  1  1 3a+1 3a+2 a+1 a+3 a+2  0 a+2  a 2a+2  2 2a+2  1 2a+1 2a+1 a+3 3a+1 a+2 3a+3 2a+3  1  2  1  2 3a+3 2a+2 a+1 2a+3 a+2 3a+2  2  1  1 3a+1
 0  0  1  0 2a+3  1 2a+2 2a+3 3a+2  a 2a+2 a+1 2a 3a+1 2a+1 3a+1 2a 3a+3 3a 3a+3  0 2a+3 2a  3 a+2  1  0 3a+3 3a+2  2 2a 2a+1 a+1 2a+1 2a+3 3a  a 3a+2  3 a+1  1  3  2  a  0 2a+2 2a+1 3a+2 3a+3
 0  0  0  1 3a+3  2 3a+1 3a+1 2a+2 2a+1 a+1 3a+3  1 3a+1 2a+3 3a+1  2  0 a+3  2  1 2a+1 3a+2  0 a+1 a+2  a  3 3a+2 2a+1 2a+1  0 3a  1  a 2a 2a+3  1  2 a+3 2a+1 3a+3 a+3 3a 2a  1  2 2a+3 2a+3

generates a code of length 49 over GR(16,4) who´s minimum homogenous weight is 133.

Homogenous weight enumerator: w(x)=1x^0+528x^133+588x^134+660x^135+1032x^136+2064x^137+2004x^138+1656x^139+1545x^140+3684x^141+2820x^142+2580x^143+2127x^144+4656x^145+3768x^146+3504x^147+3057x^148+5736x^149+3636x^150+3276x^151+2808x^152+4176x^153+3156x^154+1848x^155+1050x^156+1956x^157+828x^158+300x^159+138x^160+240x^161+96x^162+9x^164+6x^168+3x^172

The gray image is a code over GF(4) with n=196, k=8 and d=133.
This code was found by Heurico 1.16 in 14 seconds.