peri[5], pies[5], psie[5], siep[5], spie[5], pers[5], pirs[5], sire[4],
pip[5], pie[4], per[4], rep[4], sep[4], psi[4], rei[3], eis[3], sie[3], ser[3], sir[3],
pe[3], pi[3], er[2], re[2], es[2], se[2], si[2],
