C1111233131211111211113313331333133313331333133313331333133313223311312111   >>    C111123313121111121111331333133313331333133313331333133313331322331131211   <<    C1111233131211111211113313331333133313331333133313331333133313223311312113   >>      C1111233131211111211113313331333133313331333133313331333133313223311312112   >>