The generator matrix

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

generates a code of length 53 over GR(81,9) who´s minimum homogenous weight is 392.

Homogenous weight enumerator: w(x)=1x^0+72x^392+72x^394+72x^395+720x^396+288x^401+2808x^402+4032x^403+2160x^404+1184x^405+6480x^410+17496x^411+16632x^412+6696x^413+1136x^414+32544x^419+73224x^420+59328x^421+20664x^422+888x^423+65592x^428+116424x^429+77400x^430+22896x^431+752x^432+688x^441+680x^450+304x^459+192x^468+16x^477

The gray image is a code over GF(9) with n=477, k=6 and d=392.
This code was found by Heurico 1.16 in 50.6 seconds.