The generator matrix

 1  0  0  0  1  1  1  0  1  4  1  2  2  1  1  1  1  1  6  2  1  6  0  1  4  1  4  2  1  1  1  1  4  0  2  1  6  6  0  1  1  0  1  4  1  1  2  1  1  1  1  6  1  1  1  1  0  1  1  2  1  1  0  1  1  6  6  2  1
 0  1  0  0  0  1  1  1  4  0  4  1  1  1  5  0  3  4  1  6  6  4  6  2  1  7  1  1  5  3  0  6  4  1  1  3  1  6  1  4  1  2  4  1  2  7  1  7  4  2  5  1  1  7  1  7  1  4  1  1  6  6  1  5  3  1  1  4  1
 0  0  1  0  1  4  5  1  1  1  0  0  1  3  4  7  7  4  4  4  5  1  1  2  3  5  5  4  0  0  5  1  1  7  2  6  6  6  6  7  2  1  3  0  6  1  0  2  3  4  2  1  1  4  3  2  4  2  6  7  5  7  2  4  0  6  5  1  5
 0  0  0  1  4  0  4  4  1  1  7  3  1  3  3  3  0  5  5  1  0  3  6  6  4  1  3  6  6  3  6  7  2  1  0  4  3  1  3  1  2  1  2  5  6  6  4  1  4  7  1  7  5  6  1  7  3  3  0  2  2  3  2  1  5  5  4  0  2

generates a code of length 69 over Z8 who´s minimum homogenous weight is 63.

Homogenous weight enumerator: w(x)=1x^0+158x^63+298x^64+442x^65+420x^66+382x^67+369x^68+382x^69+299x^70+330x^71+211x^72+222x^73+141x^74+154x^75+87x^76+54x^77+54x^78+32x^79+34x^80+16x^81+5x^82+4x^85+1x^86

The gray image is a code over GF(2) with n=276, k=12 and d=126.
This code was found by Heurico 1.11 in 0.421 seconds.