C11111211113313112113313331333133313133313233112113313232223311   >>    C1111121111331311211331333133313331313331323311211331323222331   <<    C11111211113313112113313331333133313133313233112113313232223313   >>      C11111211113313112113313331333133313133313233112113313232223312   >>