C1111233131211111211113313331333133313133313331333112211232313232321   >>    C111123313121111121111331333133313331313331333133311221123231323232   <<    C1111233131211111211113313331333133313133313331333112211232313232323   >>      C1111233131211111211113313331333133313133313331333112211232313232322   >>