8. There are 10 young men, each with a different weight and height; for any two young men $\mathbf{A}$ and $\mathbf{B}$, if $\mathbf{A}$ is heavier than $\mathbf{B}$, or $\mathbf{A}$ is taller than $\mathbf{B}$, then we say “$\mathrm{A}$ is not worse than B”; if a young man is not worse than the other 9 people, he is called a “great guy”. Then, how many “great guys” can there be at most among these 10 people.