C11112331333132311331333133313331323132313331211111333132313232311   >>    C1111233133313231133133313331333132313231333121111133313231323231   <<    C11112331333132311331333133313331323132313331211111333132313232313   >>      C11112331333132311331333133313331323132313331211111333132313232312   >>