teter[7], tetro[7], retor[6], retro[6],
tetr[6], tret[6], tort[6], eter[5], tere[5], erot[5], tero[5], oere[4],
eto[4], ret[4], ter[4], ort[4], rot[4], tor[4], ero[3],
et[3], te[3], ot[3], to[3], ee[2], eo[2], er[2], re[2], or[2], ro[2],
