C111123313331323113313331333133313331323132333133313331322223313233121   >>    C11112331333132311331333133313331333132313233313331333132222331323312   <<    C111123313331323113313331333133313331323132333133313331322223313233123   >>      C111123313331323113313331333133313331323132333133313331322223313233122   >>