C11112331333132311331333133313331323132313331211113311232311321   >>    C1111233133313231133133313331333132313231333121111331123231132   <<    C11112331333132311331333133313331323132313331211113311232311323   >>      C11112331333132311331333133313331323132313331211113311232311322   >>