C11111333133313232233133313331333133313231333133313113313331211112211232111   >>    C1111133313331323223313331333133313331323133313331311331333121111221123211   <<    C11111333133313232233133313331333133313231333133313113313331211112211232113   >>      C11111333133313232233133313331333133313231333133313113313331211112211232112   >>