C1111233131211111211113313331333133313331333133313331333133313113313133213311   >>    C111123313121111121111331333133313331333133313331333133313331311331313321331   <<    C1111233131211111211113313331333133313331333133313331333133313113313133213313   >>      C1111233131211111211113313331333133313331333133313331333133313113313133213312   >>