C111123313331323113313331333133313231323133312111112111111331313233111   >>    C11112331333132311331333133313331323132313331211111211111133131323311   <<    C111123313331323113313331333133313231323133312111112111111331313233113   >>      C111123313331323113313331333133313231323133312111112111111331313233112   >>