efeb[10], basf[10], safe[8], bace[7], bece[7], scab[7], seba[6], esce[5],
caf[8], efa[7], fee[7], fas[7], fes[7], cab[6], bee[5], bas[5], ces[4],
fa[6], ef[6], fe[6], ba[4], be[4], ce[3], ee[2], as[2], es[2], se[2],
