pieg[7], egri[6], ergi[6], gier[6], grei[6], peri[5],
gig[7], gie[5], erg[5], gir[5], igr[5], irg[5], pie[4], per[4], rep[4], rei[3],
pe[3], pi[3], ee[2], er[2], re[2],
