C11111333133313232233133313331333133313231333133313113313331211112211232312111   >>    C1111133313331323223313331333133313331323133313331311331333121111221123231211   <<    C11111333133313232233133313331333133313231333133313113313331211112211232312113   >>      C11111333133313232233133313331333133313231333133313113313331211112211232312112   >>