The generator matrix

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

generates a code of length 28 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 53.

Homogenous weight enumerator: w(x)=1x^0+402x^53+420x^54+342x^56+554x^57+384x^59+72x^60+2x^63+6x^65+4x^66

The gray image is a code over GF(3) with n=252, k=7 and d=159.
This code was found by Heurico 1.16 in 4.04 seconds.