#include <cstdio>
#include <cstring>

int n;
char s[105];

int main()
{
	scanf("%s", s + 1);
	n = strlen(s + 1);
	bool ans = true;
	for (int i = 1; i <= n; ++i)
		if (s[i] != '9')
			ans = false;
	if (ans)
		puts("Yes");
	else
		puts("No");
	return 0;
}