C21221212121211331313233313131133132333132313223313231323221333132313111   >>    C2122121212121133131323331313113313233313231322331323132322133313231311   <<    C21221212121211331313233313131133132333132313223313231323221333132313113   >>      C21221212121211331313233313131133132333132313223313231323221333132313112   >>