The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+852x^33+1836x^34+1602x^35+7204x^36+8748x^37+19332x^38+23682x^39+36774x^40+36234x^41+23700x^42+12420x^43+2610x^44+2038x^45+114x^48

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 49 seconds.