C312312111111331312111133133313331333133323132322331311331322123311   >>    C31231211111133131211113313331333133313332313232233131133132212331   <<    C312312111111331312111133133313331333133323132322331311331322123313   >>      C312312111111331312111133133313331333133323132322331311331322123312   >>