bond[7], obco[7], dobo[7], codo[6], bono[6], obon[6], snob[6], boso[6], sond[5], sodo[5],
cob[6], bod[6], cod[5], doc[5], bon[5], noc[4], dno[4], don[4], odo[4], soc[4], ono[3], nos[3], son[3], oso[3],
bo[4], co[3], do[3], od[3], no[2], on[2], os[2],
