ibis[6], bios[6], bosi[6], boss[6], hoss[6], ossi[4],
boi[5], obi[5], hoi[5], bis[5], his[5], osi[3], sio[3], soi[3], sos[3],
bi[4], hi[4], bo[4], ho[4], oh[4], ii[2], si[2], os[2],
