C11112331333132311331333132313331333133313233121111331333132313331333112123121   >>    C1111233133313231133133313231333133313331323312111133133313231333133311212312   <<    C11112331333132311331333132313331333133313233121111331333132313331333112123123   >>      C11112331333132311331333132313331333133313233121111331333132313331333112123122   >>