C21221212121211331313233313131133132333132313223313113313232112323311   >>    C2122121212121133131323331313113313233313231322331311331323211232331   <<    C21221212121211331313233313131133132333132313223313113313232112323313   >>      C21221212121211331313233313131133132333132313223313113313232112323312   >>