The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  X  1  X  X  1  X  X  1  1  X  X  X  X  X  X  X  X  X  X  X  X  1  3  1
 0  3  0  0  3  0  3  3  6  0  0  3  3  0  6  3  6  6  0  3  6  0  3  6  6  6  6  0  0  0  3  3  0  3  3  6  0  0  3  3  0  6  3  6  6  0  3  3  6  3  0  6  0  0  0  3  3  3  3  6  3  6  6  0  6  6  0  6  6  0  6
 0  0  3  0  6  3  6  3  6  0  3  3  0  6  0  0  3  3  6  6  6  6  3  0  0  3  6  0  0  3  6  3  3  6  0  6  0  3  3  0  6  0  0  3  3  6  6  3  6  0  0  0  3  3  6  3  6  3  6  0  3  0  3  0  0  3  6  6  0  3  3
 0  0  0  3  6  6  0  6  6  6  3  0  6  0  6  3  3  0  3  3  3  6  3  0  3  6  0  0  3  6  6  6  3  3  3  6  6  0  0  0  3  3  6  6  3  0  0  3  0  0  3  0  0  6  6  3  3  0  6  3  6  6  0  6  0  3  3  6  6  0  0

generates a code of length 71 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 139.

Homogenous weight enumerator: w(x)=1x^0+114x^139+162x^140+44x^141+324x^143+22x^144+42x^148+8x^150+4x^153+6x^157+2x^159

The gray image is a code over GF(3) with n=639, k=6 and d=417.
This code was found by Heurico 1.16 in 5 seconds.