C31211133313132313231323331313132313231313232233132333132333132333132322121231   >>    C3121113331313231323132333131313231323131323223313233313233313233313232212123   <<    C31211133313132313231323331313132313231313232233132333132333132333132322121233   >>      C31211133313132313231323331313132313231313232233132333132333132333132322121232   >>