C11112331333132311331333133313331333132313121111331312133112111   >>    C1111233133313231133133313331333133313231312111133131213311211   <<    C11112331333132311331333133313331333132313121111331312133112113   >>      C11112331333132311331333133313331333132313121111331312133112112   >>