C11111333133313232233133313331333131133132313311211111131233121   >>    C1111133313331323223313331333133313113313231331121111113123312   <<    C11111333133313232233133313331333131133132313311211111131233123   >>      C11111333133313232233133313331333131133132313311211111131233122   >>