The generator matrix

 1  1  1  1  1  1  1  1  1  1  1
 0  X  0  X a*X a*X a^2*X a^5*X  0  X a*X
 0  0  X a^7*X a*X a^2*X a^6*X a^7*X a^3*X a^6*X  X

generates a code of length 11 over F9[X]/(X^2) who´s minimum homogenous weight is 72.

Homogenous weight enumerator: w(x)=1x^0+64x^72+248x^81+5832x^88+192x^90+224x^99

The gray image is a linear code over GF(9) with n=99, k=4 and d=72.
This code was found by Heurico 1.16 in 0.00223 seconds.