The generator matrix

 1  0  1  1  1  0  1  1  0  1  1  0  1  1  2  1  1  2  1  1  2  1  1  2  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  0  0  0  0  2  2  2  2  1  1  1  1  1  1  1  1  1
 0  1  1  0  3  1  0  3  1  0  1  1  2  3  1  2  3  1  2  1  1  2  1  1  0  0  0  0  3  3  3  3  2  2  2  2  1  1  1  1  1  1  1  1  1  1  1  1  0  0  0  2  0  2  2  2  0
 0  0  2  0  2  0  2  0  2  2  0  2  2  0  2  0  2  0  2  2  2  0  0  0  0  0  2  2  0  0  2  2  2  2  0  0  2  2  0  0  0  0  2  2  2  2  0  0  0  0  2  2  2  2  0  0  0
 0  0  0  2  2  2  2  0  0  0  2  2  0  2  0  2  0  2  2  2  2  0  0  0  0  2  2  0  0  2  2  0  0  2  2  0  0  2  2  0  0  2  2  0  0  2  2  0  0  2  2  0  0  2  2  0  0

generates a code of length 57 over Z4 who´s minimum homogenous weight is 56.

Homogenous weight enumerator: w(x)=1x^0+14x^56+32x^57+14x^58+1x^64+2x^82

The gray image is a code over GF(2) with n=114, k=6 and d=56.
This code was found by Heurico 1.16 in 0.0251 seconds.