C1111233131211111211113313331333133313221211113313331333133313232233132231211   >>    C111123313121111121111331333133313331322121111331333133313331323223313223121   <<    C1111233131211111211113313331333133313221211113313331333133313232233132231213   >>      C1111233131211111211113313331333133313221211113313331333133313232233132231212   >>