C211111133131323223313233313231133132333132311221123231333132313233313232212311   >>    C21111113313132322331323331323113313233313231122112323133313231323331323221231   <<    C211111133131323223313233313231133132333132311221123231333132313233313232212313   >>      C211111133131323223313233313231133132333132311221123231333132313233313232212312   >>