C11111211113313112113313331333133312111113331333133313331133223313232111211   >>    C1111121111331311211331333133313331211111333133313331333113322331323211121   <<    C11111211113313112113313331333133312111113331333133313331133223313232111213   >>      C11111211113313112113313331333133312111113331333133313331133223313232111212   >>