C1111233131211111211113313331333133313331333133311221121111331311211   >>    C111123313121111121111331333133313331333133313331122112111133131121   <<    C1111233131211111211113313331333133313331333133311221121111331311213   >>      C1111233131211111211113313331333133313331333133311221121111331311212   >>