Several students guessed the ranking of the physics competition. Xiao Zhong said: "Xiaohua is third, Xiaoren is fifth. " Xiaohua said: "Xiaomin is fifth, Xiaogong fourth. " Xiaoren said: "Xiao Zhong First, Xiaomin is the fourth. "Xiaomin said:" Xiao Ren is the first, Xiaohua is the second. "Xiaogong said:" Xiao Zhong is the third, Xiaomin is the fourth. "It is known that there is no tied position in this competition. And each position has talent pairs. Then, the specific ranking should be:. ['Xiaohua first, Xiao Zhong second, Xiao Ren third, Xiao Min fourth, Xiaogong fifth.', 'Xiaomin first, Xiaoren second, Xiaohua third, Xiaogong fourth, Xiaozhong fifth.', 'Xiao Ren first, Xiao Hua second, Xiao Zhong third, Xiao Gong fourth, Xiao Min fifth.', 'Xiao Ren first, Xiao Min second, Xiao Zhong third, Xiao Gong fourth, Xiao Hua fifth.']