The generator matrix

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

generates a code of length 57 over Z4 who´s minimum homogenous weight is 48.

Homogenous weight enumerator: w(x)=1x^0+159x^48+428x^50+496x^52+569x^54+455x^56+508x^58+466x^60+416x^62+296x^64+174x^66+100x^68+15x^70+9x^72+2x^74+2x^76

The gray image is a code over GF(2) with n=114, k=12 and d=48.
This code was found by Heurico 1.16 in 1.96 seconds.