C31231211111133131211113313331323133313113313223133313331333132233232212311   >>    C3123121111113313121111331333132313331311331322313331333133313223323221231   <<    C31231211111133131211113313331323133313113313223133313331333132233232212313   >>      C31231211111133131211113313331323133313113313223133313331333132233232212312   >>