bab[7], bob[7], bat[6], tab[6], bet[6], bot[6], bee[5], abo[5], boa[5], oba[5], ate[4], eta[4], tao[4], eto[4],
ba[4], be[4], bo[4], at[3], ta[3], et[3], te[3], ot[3], to[3], ee[2], eo[2],