dirn[4], drin[4], rind[4], sind[4], diss[4], niss[4], riss[4], sirs[4], nist[4], rist[4], isst[4],
nid[3], dir[3], dis[3], ins[3], sir[3], iss[3], ist[3],
in[2], si[2], ti[2], st[2],