C111123313331323113313331333133313331323112133313331323231323323111   >>    C11112331333132311331333133313331333132311213331333132323132332311   <<    C111123313331323113313331333133313331323112133313331323231323323113   >>      C111123313331323113313331333133313331323112133313331323231323323112   >>