C11111211113313112113313331333133313231311331333113313232233313113121   >>    C1111121111331311211331333133313331323131133133311331323223331311312   <<    C11111211113313112113313331333133313231311331333113313232233313113123   >>      C11111211113313112113313331333133313231311331333113313232233313113122   >>