The generator matrix

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

generates a code of length 20 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 33.

Homogenous weight enumerator: w(x)=1x^0+906x^33+1530x^34+1530x^35+8538x^36+8046x^37+16956x^38+27588x^39+36180x^40+31482x^41+28704x^42+11106x^43+2520x^44+1926x^45+132x^48+2x^54

The gray image is a code over GF(3) with n=180, k=11 and d=99.
This code was found by Heurico 1.16 in 461 seconds.