idol[6], lido[6], lord[6], lori[6], duld[5], drud[4],
dol[5], lid[4], ido[4], iod[4], rod[4], roi[4], lud[4], duo[4], dir[3], dur[3],
do[3], od[3], ul[3], du[2], ud[2], ui[2], ur[2],
