C1111233131211111211113313331333133313331333133313331333133313113313123213111   >>    C111123313121111121111331333133313331333133313331333133313331311331312321311   <<    C1111233131211111211113313331333133313331333133313331333133313113313123213113   >>      C1111233131211111211113313331333133313331333133313331333133313113313123213112   >>