The generator matrix

 1  0  1  1
 0  1 2X+7 X+6

generates a code of length 4 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 6.

Homogenous weight enumerator: w(x)=1x^0+86x^6+12x^7+450x^8+172x^9+6x^10+2x^12

The gray image is a code over GF(3) with n=36, k=6 and d=18.
This code was found by Heurico 1.16 in 7.61e-005 seconds.