bigo[8], bogi[8], oboi[6], bios[6], bosi[6], boso[6],
big[7], gib[7], boi[5], obi[5], goi[5], ogi[5], bis[5], gis[5], osi[3], sio[3], soi[3], oso[3],
bi[4], bo[4], go[4], si[2], os[2],
