bub[9], buc[8], pub[8], bob[7], obu[7], cup[7], puc[7], bus[7], cob[6], opu[6], psu[6], spu[6], sou[5], soc[4], osp[4],
bu[6], bo[4], su[4], co[3], op[3], po[3], os[2],
