C11111211113313112113313331333133313221333133313113313331322331322321133122311   >>    C1111121111331311211331333133313331322133313331311331333132233132232113312231   <<    C11111211113313112113313331333133313221333133313113313331322331322321133122313   >>      C11111211113313112113313331333133313221333133313113313331322331322321133122312   >>