sera[4], sers[4], rewa[4], wars[4], serw[4], wers[4], ssaw[4],
era[3], rea[3], ars[3], ras[3], sra[3], ser[3], sas[3], ewa[3], rwa[3], war[3], rew[3], wre[3], swa[3], was[3], swe[3],
ar[2], er[2], re[2], as[2], es[2], se[2], ew[2], we[2],
