C1111233131211111211113313331333133313331312331333131133133313332112323211   >>    C111123313121111121111331333133313331333131233133313113313331333211232321   <<    C1111233131211111211113313331333133313331312331333131133133313332112323213   >>      C1111233131211111211113313331333133313331312331333131133133313332112323212   >>