aabb style nickname

Zuozuo, Youyou, Yuanyuan, Fangfang, Pingping, An'an, Baoer, Beier, Huanhuan, Lele, Heehee, Haha, Jixiang, Ruyi, Tuantuan, Yuanyuan, Huan Huan, Xixi, Lingling, Dangdang, Nannan, Dudu, Lingling, Qiaoqiao, Zhenzhen, Meimei, Mimi, Miaomiao, Nannan, Beibei, Circle, Diandian, Tangtang, Guoguo, Doudou, Tiantian, An'an, Jingjing, Wenwen, Naolao, Tiantian, Mimi, Kaikai, Xinxin, Kuaikuai, Lele, Peipei, Jiajia, Pangpang, Dudu, Maomao, Doudou, Guaiguai, Qiaoqiao, Pipi, Qiuqiu, Dongdong, Xixi, Chenchen, Xixi, Chaochao, Yangyang, Zhizhi, Yongyong, Guagua, Guoguo, Bobo, Taotao, Lingling, Yu Yu, Minmin, Congcong, Jiajia, Lele, Kaikai, Xuanxuan, Tuoduo, Wenwen