C111123313331323113313331333133313331323112133313331333121111123231323223331   >>    C11112331333132311331333133313331333132311213331333133312111112323132322333   <<    C111123313331323113313331333133313331323112133313331333121111123231323223333   >>      C111123313331323113313331333133313331323112133313331333121111123231323223332   >>