C1111233131211111211113313331333133313232212111133133311221123221   >>    C111123313121111121111331333133313331323221211113313331122112322   <<    C1111233131211111211113313331333133313232212111133133311221123223   >>      C1111233131211111211113313331333133313232212111133133311221123222   >>