C11111333133313232233133313331333132313331333133313311232123121   >>    C1111133313331323223313331333133313231333133313331331123212312   <<    C11111333133313232233133313331333132313331333133313311232123123   >>      C11111333133313232233133313331333132313331333133313311232123122   >>