bici[7], ibis[6], bios[6], bosi[6], cisi[5], cios[5],
cob[6], boi[5], obi[5], bis[5], cis[4], sic[4], soc[4], osi[3], sio[3], soi[3],
bi[4], bo[4], ci[3], co[3], ii[2], si[2], os[2],
