bomb[9], bobo[8], obco[7], boom[7], obom[7], boso[6], osom[5], somo[5],
bob[7], cob[6], bom[6], mob[6], com[5], moc[5], omo[4], soc[4], osm[4], som[4], oso[3],
bo[4], co[3], om[3], os[2],
