The generator matrix

 1  0  0  0  1  1  1  6  1  1  1  1  1  1  1  3  1  1  0 2X+6 2X+6  1  1  1 2X+6  1 2X+3  1  1  1  X  1  1 2X  1  1  1 X+6  1  X  1  1  1  1 X+3  1  1  1 2X  1  1  1  1  1  1  1  1 2X  1  1  0 X+3  1  1  X  6 X+6  3  0  1  1  1  1  1  3  1
 0  1  0  0  6  1  4  1  X X+3  2  8 X+7  1 2X+2 X+3 2X+4 X+6  1  X  1  5 2X+7  X  1  7  1 X+4  3 X+5  1 2X+3 X+8  1 2X+6 X+4 2X+5  1  8  1  3 2X+8 X+2 X+8  1  X 2X+8 X+5 2X+3 X+3  0  3 2X+3  7 2X+2 2X+4  2 2X+3 X+4 2X+5  1 2X+3 X+6  1  1  1  1  1  1 2X X+2  6  4  6 2X+6  0
 0  0  1  0 2X+7 2X+1 X+5 2X+4 X+1 X+8 2X+3 X+4 2X+8  6  8  1 2X+7 X+3  8  1 2X+2  6 X+5  5  0  X X+1 2X+3  5 2X+6 X+7 2X+1  2 X+5 X+6  4 X+4  X  1 2X+8 X+7 2X+5 X+7 X+2 2X+7  3  X 2X+8  3 2X+1  1 2X+5 2X X+4 X+5  8 2X+1  1 2X+2 2X+8 2X+4  1 X+5 2X+5 2X+6 2X+5  4  5 X+8 2X+5 2X+7 2X 2X+8 X+4  1  0
 0  0  0  1 2X+5  3 2X+2 2X+2  1 X+3 2X+1 X+6 2X+7 2X+6  X 2X+8  8 X+7 X+3 X+7 X+2 X+5  3 X+8  2 2X+1 X+7 2X+5 X+1  3  X X+3 2X+1 2X+4 2X+2 X+7 2X+5  7 X+4  3 2X+3 2X+2 X+2 2X+4 2X+4 2X+6 X+8 2X  1 X+2  4 X+5  7 2X+7 X+8 2X+3 X+6 2X X+5  1  5 X+8 X+4  7 2X+6 X+5  6  6 X+5  0 X+6  5 X+3  1 X+8 2X

generates a code of length 76 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 140.

Homogenous weight enumerator: w(x)=1x^0+708x^140+1700x^141+3714x^142+6648x^143+9798x^144+13146x^145+18834x^146+22984x^147+28062x^148+35400x^149+42806x^150+45834x^151+51546x^152+51350x^153+46170x^154+46224x^155+36420x^156+26016x^157+19380x^158+11842x^159+6654x^160+3264x^161+1530x^162+822x^163+192x^164+110x^165+120x^166+24x^167+46x^168+30x^169+30x^170+6x^171+18x^172+12x^174

The gray image is a code over GF(3) with n=684, k=12 and d=420.
This code was found by Heurico 1.16 in 648 seconds.