C312312111111331312111133133313231333131211331333133313332233223311   >>    C31231211111133131211113313331323133313121133133313331333223322331   <<    C312312111111331312111133133313231333131211331333133313332233223313   >>      C312312111111331312111133133313231333131211331333133313332233223312   >>