The generator matrix

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

generates a code of length 22 over Z8 who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+276x^18+304x^19+695x^20+464x^21+676x^22+496x^23+611x^24+240x^25+260x^26+32x^27+37x^28+4x^30

The gray image is a code over GF(2) with n=88, k=12 and d=36.
This code was found by Heurico 1.16 in 1.63 seconds.