C11111211113313112113313331333133313231311331333133312113313221123311   >>    C1111121111331311211331333133313331323131133133313331211331322112331   <<    C11111211113313112113313331333133313231311331333133312113313221123313   >>      C11111211113313112113313331333133313231311331333133312113313221123312   >>