The generator matrix

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

generates a code of length 21 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 35.

Homogenous weight enumerator: w(x)=1x^0+306x^35+796x^36+396x^37+2466x^38+2802x^39+6588x^40+7668x^41+11958x^42+12852x^43+7740x^44+3856x^45+576x^46+666x^47+258x^48+108x^50+12x^51

The gray image is a code over GF(3) with n=189, k=10 and d=105.
This code was found by Heurico 1.16 in 9.2 seconds.