C11112331333132311331333133313331323132313331211113311222332321   >>    C1111233133313231133133313331333132313231333121111331122233232   <<    C11112331333132311331333133313331323132313331211113311222332323   >>      C11112331333132311331333133313331323132313331211113311222332322   >>