retem[7], terem[7], teter[7],
metr[6], term[6], trem[6], tetr[6], tret[6], erem[5], eter[5], tere[5],
met[5], mee[4], mer[4], rem[4], ret[4], ter[4],
em[3], me[3], et[3], te[3], ee[2], er[2], re[2],
