C11112331333132311331333133313331323132313331211113313113311233111   >>    C1111233133313231133133313331333132313231333121111331311331123311   <<    C11112331333132311331333133313331323132313331211113313113311233113   >>      C11112331333132311331333133313331323132313331211113313113311233112   >>