berd[7], debr[7], bero[6], ober[6], dero[5], redo[5],
bod[6], ber[5], erb[5], reb[5], bor[5], rob[5], deo[4], ode[4], der[4], red[4], odr[4], ord[4], rod[4], ero[3],
be[4], bo[4], de[3], do[3], od[3], eo[2], er[2], re[2], or[2], ro[2],
