The generator matrix

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

generates a code of length 54 over Z4 who´s minimum homogenous weight is 56.

Homogenous weight enumerator: w(x)=1x^0+3x^56+8x^57+2x^58+2x^62

The gray image is a code over GF(2) with n=108, k=4 and d=56.
This code was found by Heurico 1.16 in 0.0188 seconds.