C11111211113313112113313331333133313133313232233131333131133133311231   >>    C1111121111331311211331333133313331313331323223313133313113313331123   <<    C11111211113313112113313331333133313133313232233131333131133133311233   >>      C11111211113313112113313331333133313133313232233131333131133133311232   >>