boru[8], buro[8], brus[8], burs[8], ruro[6], suro[6], rowu[6], woru[6], osuw[6], owsu[6],
obu[7], bru[7], bur[7], bus[7], bor[5], rob[5], brr[5], oru[5], rur[5], sou[5], rus[5], sur[5], suw[5], ros[3], rwo[3], wrr[3],
bu[6], bo[4], su[4], wu[4], or[2], ro[2], os[2],
