dodo[6], dedr[6], dred[6], dero[5], redo[5], odro[5], ordo[5], oreo[4],
deo[4], ode[4], odo[4], der[4], red[4], odr[4], ord[4], rod[4], drr[4], ero[3], oro[3],
de[3], do[3], od[3], eo[2], er[2], re[2], or[2], ro[2],
