C11112331333132311331333133313331323132313331211111333132322333321   >>    C1111233133313231133133313331333132313231333121111133313232233332   <<    C11112331333132311331333133313331323132313331211111333132322333323   >>      C11112331333132311331333133313331323132313331211111333132322333322   >>