C21221212121211331313233313131133132333132313223313113313231333132323321311   >>    C2122121212121133131323331313113313233313231322331311331323133313232332131   <<    C21221212121211331313233313131133132333132313223313113313231333132323321313   >>      C21221212121211331313233313131133132333132313223313113313231333132323321312   >>