fob[9], efa[7], efo[7], bad[6], dba[6], bod[6], abo[5], boa[5], oba[5], dao[4], oda[4], deo[4], ode[4],
fa[6], ef[6], fe[6], ba[4], be[4], bo[4], ad[3], da[3], de[3], do[3], od[3], eo[2],
