biec[7], bied[7], cedi[6], ciep[6], pice[6], piec[6],
bib[7], bid[6], cep[5], cip[5], pic[5], dip[5], pip[5], cie[4], pie[4],
be[4], bi[4], ce[3], de[3], ci[3], id[3], pe[3], pi[3],
