C1111233131211111211113313331333133313331312331333131211111332212232133121   >>    C111123313121111121111331333133313331333131233133313121111133221223213312   <<    C1111233131211111211113313331333133313331312331333131211111332212232133123   >>      C1111233131211111211113313331333133313331312331333131211111332212232133122   >>