The three male classmates Ma Ming, Liu Jian, and Zhang Yi each have a sister  On this day, six people played badminton together  The men's and women's mixed doubles were held, and it was stipulated that the two brothers and sisters should not go together  The situation in the first game is: Liu Jianhe Xiaoping vs  Zhang Yi and Xiaoying  The situation in the second game: Zhang Yi and Xiaohong vs
Liu Jian and Ma Ming's sister
Liu Jian and Xiaohong, Ma Ming and Xiaoying, Zhang Yi and Xiaoping are each brother and sister