boich[10],
hobo[8], choi[7], obco[7], oboi[6],
chi[6], ich[6], cob[6], hoc[6], och[6], boi[5], obi[5], hoi[5], oho[5],
bi[4], hi[4], bo[4], ho[4], oh[4], ci[3], co[3],
