C12121321333132233131333131133131211113313113313113313231323221121   >>    C1212132133313223313133313113313121111331311331311331323132322112   <<    C12121321333132233131333131133131211113313113313113313231323221123   >>      C12121321333132233131333131133131211113313113313113313231323221122   >>