C11112331333132311331333132313331333133313233111211113313123121   >>    C1111233133313231133133313231333133313331323311121111331312312   <<    C11112331333132311331333132313331333133313233111211113313123123   >>      C11112331333132311331333132313331333133313233111211113313123122   >>