C11112331333132311331333133313331333132311213331333133313223311232313121   >>    C1111233133313231133133313331333133313231121333133313331322331123231312   <<    C11112331333132311331333133313331333132311213331333133313223311232313123   >>      C11112331333132311331333133313331333132311213331333133313223311232313122   >>