C3123121111331311213331333131133133313331333133313231323232212311   >>    C312312111133131121333133313113313331333133313331323132323221231   <<    C3123121111331311213331333131133133313331333133313231323232212313   >>      C3123121111331311213331333131133133313331333133313231323232212312   >>