C111123313331323113313331333133313331323112133313331333121111211312321   >>    C11112331333132311331333133313331333132311213331333133312111121131232   <<    C111123313331323113313331333133313331323112133313331333121111211312323   >>      C111123313331323113313331333133313331323112133313331333121111211312322   >>