C1111233131211111211113313331333133313331333133311221123221311211   >>    C111123313121111121111331333133313331333133313331122112322131121   <<    C1111233131211111211113313331333133313331333133311221123221311213   >>      C1111233131211111211113313331333133313331333133311221123221311212   >>