berę[10], borę[10], robę[10], bero[6], ober[6], boro[6], robo[6], oreo[4],
erę[7], ber[5], erb[5], reb[5], bor[5], rob[5], ero[3], oro[3],
be[4], bo[4], eo[2], er[2], re[2], or[2], ro[2],
