fob[9], cif[8], pif[8], bid[6], cob[6], bod[6], cod[5], doc[5], boi[5], obi[5], cip[5], pic[5], dip[5], pod[5], doi[4], ido[4], poi[4],
fi[6], bi[4], bo[4], ci[3], id[3], co[3], do[3], od[3], pi[3], op[3], po[3],
