becie[8], bocie[8], cobie[8], obiec[8],
bece[7], biec[7], obce[7], obco[7], obie[6], oboi[6], ecie[5],
cob[6], bee[5], boi[5], obi[5], cie[4],
be[4], bi[4], bo[4], ce[3], ci[3], co[3], ee[2], eo[2],
