stirn[5], irrst[5], sirrt[5], risst[5],
sirr[4], niss[4], riss[4], sirs[4], irrt[4], nist[4], rist[4], isst[4],
irr[3], ins[3], sir[3], iss[3], ist[3],
in[2], si[2], ti[2], st[2],
