C111123313331323113313331333133313331323112133313331333121111123231323222121211   >>    C11112331333132311331333133313331333132311213331333133312111112323132322212121   <<    C111123313331323113313331333133313331323112133313331333121111123231323222121213   >>      C111123313331323113313331333133313331323112133313331333121111123231323222121212   >>