C11111211113313112113313331333133313331322331333132233132212311   >>    C1111121111331311211331333133313331333132233133313223313221231   <<    C11111211113313112113313331333133313331322331333132233132212313   >>      C11111211113313112113313331333133313331322331333132233132212312   >>