cud[7], cup[7], puc[7], dup[7], pud[7], dnu[6], nud[6], pun[6], cru[6], dur[6], rud[6], urd[6], psu[6], spu[6], nur[5], run[5], urn[5], snu[5], rus[5], sur[5],
ud[5], nu[4], su[4],
