sersu[7], serwu[7], wersu[7],
ruse[6], sure[6], eruw[6], sers[4], serw[4], wers[4],
rur[5], esu[5], rus[5], sur[5], sus[5], suw[5], ser[3], rew[3], wre[3], wrr[3], swe[3],
su[4], wu[4], er[2], re[2], es[2], se[2], ew[2], we[2],
