C1111233131211111211113313331333133313232212111133131133133313331331123121   >>    C111123313121111121111331333133313331323221211113313113313331333133112312   <<    C1111233131211111211113313331333133313232212111133131133133313331331123123   >>      C1111233131211111211113313331333133313232212111133131133133313331331123122   >>