C11111333133313232233133313331333132313331333133313113311212321   >>    C1111133313331323223313331333133313231333133313331311331121232   <<    C11111333133313232233133313331333132313331333133313113311212323   >>      C11111333133313232233133313331333132313331333133313113311212322   >>