C31231211111133131211113313331323133313331312121111331323233223311   >>    C3123121111113313121111331333132313331333131212111133132323322331   <<    C31231211111133131211113313331323133313331312121111331323233223313   >>      C31231211111133131211113313331323133313331312121111331323233223312   >>