3 5 xiaobao sansan tiantian baobao doudou 3 xiaobao niuniu doudou 1 xing 0 2 san qiaoqiao 1 san
Case 1: xiaobao:doudou sansan niuniu:none doudou:baobao xiaobao Case 2: Case 3: san:qiaoqiao qiaoqiao