C1111233131211111211113313331333133313331333133313331333133313112221231211   >>    C111123313121111121111331333133313331333133313331333133313331311222123121   <<    C1111233131211111211113313331333133313331333133313331333133313112221231213   >>      C1111233131211111211113313331333133313331333133313331333133313112221231212   >>