depo[6], epod[6], pode[6], drop[6], dero[5], redo[5], oper[5], pero[5], oere[4],
pod[5], deo[4], ode[4], der[4], red[4], odr[4], ord[4], rod[4], per[4], rep[4], por[4], pro[4], rop[4], ero[3],
de[3], do[3], od[3], pe[3], op[3], po[3], ee[2], eo[2], er[2], re[2], or[2], ro[2],
