=-brs1+brs6+brs11+brs16+brs21+brs26+brs31-brs36+brs41+brs46+brs51+brs56
=+brs2-brs7+brs12+brs17+brs22-brs27+brs32+brs37+brs42+brs47+brs52+brs57
=+brs3+brs8-brs13+brs18+brs23+brs28-brs33+brs38+brs43+brs48+brs53+brs58
=+brs4+brs9+brs14-brs19+brs24+brs29+brs34+brs39+brs44-brs49+brs54+brs59