C11112331333132311331333132313331333133313233121111331333233121   >>    C1111233133313231133133313231333133313331323312111133133323312   <<    C11112331333132311331333132313331333133313233121111331333233123   >>      C11112331333132311331333132313331333133313233121111331333233122   >>