choro[8], ochro[8], oboro[7],
hobo[8], bohr[8], obco[7], chor[7], ochr[7], boro[6], robo[6], horo[6], coro[5],
cob[6], hoc[6], och[6], oho[5], bor[5], rob[5], hor[5], rho[5], oro[3],
bo[4], ho[4], oh[4], co[3], or[2], ro[2],
