beto[7], webo[6], wtop[6], weto[5],
bet[6], bot[6], bee[5], pet[5], pot[5], top[5], web[5], eto[4], twe[4], wet[4], wte[4], ewe[3], ewo[3], owe[3],
be[4], bo[4], pe[3], op[3], po[3], et[3], te[3], ot[3], to[3], ee[2], eo[2], ew[2], we[2],
