C31211133313132313231323331313132313231313232233132333131133132212121   >>    C3121113331313231323132333131313231323131323223313233313113313221212   <<    C31211133313132313231323331313132313231313232233132333131133132212123   >>      C31211133313132313231323331313132313231313232233132333131133132212122   >>