dirn[4], drin[4], rind[4], rinn[4], rund[4], ruin[4], urin[4], urdu[4],
nid[3], dir[3], irr[3], dun[3], und[3], uni[3], nun[3], dur[3], nur[3], run[3],
in[2], du[2], ud[2], ui[2], nu[2], ur[2],
