bistr[8], irbis[7],
bigi[8], gips[7], tigr[7], irgi[6], ibis[6], tipi[6], trip[6], tips[6], pirs[5],
big[7], gib[7], bit[6], git[6], gir[5], igr[5], irg[5], bis[5], gis[5], pit[5], pst[5], psi[4], itr[4], tir[4], tri[4], sit[4], sir[3],
bi[4], pi[3], ts[3], ii[2], si[2],
