rococ[7], corso[6],
obco[7], boro[6], robo[6], boso[6], coro[5], cors[5], roso[4],
cob[6], bor[5], rob[5], soc[4], oro[3], oso[3], ros[3],
bo[4], co[3], or[2], ro[2], os[2],
