C21221212121211331313233313131133132333132313223313221323132311   >>    C2122121212121133131323331313113313233313231322331322132313231   <<    C21221212121211331313233313131133132333132313223313221323132313   >>      C21221212121211331313233313131133132333132313223313221323132312   >>