birry[8], ibisy[8], sybir[8], irbis[7],
bryi[7], rybi[7], bisy[7], birr[6], ibis[6], irys[5], rysi[5],
bry[6], ryb[6], brr[5], bis[5], rys[4], sir[3],
by[5], bi[4], ii[2], si[2],
