C111123313121111121111331333133313331323232133313331333133323133313331323212121   >>    C11112331312111112111133133313331333132323213331333133313332313331333132321212   <<    C111123313121111121111331333133313331323232133313331333133323133313331323212123   >>      C111123313121111121111331333133313331323232133313331333133323133313331323212122   >>