bohr[8], bort[7], torb[7], zorb[6], worz[4],
bot[6], hot[6], bor[5], rob[5], hor[5], rho[5], ort[4], rot[4], tor[4], rwo[3], orz[3],
bo[4], ho[4], oh[4], ot[3], to[3], or[2], ro[2], oz[2],
