C11112331333132311331333133313331323132313331211113311221123222221   >>    C1111233133313231133133313331333132313231333121111331122112322222   <<    C11112331333132311331333133313331323132313331211113311221123222223   >>      C11112331333132311331333133313331323132313331211113311221123222222   >>