#include<bits/stdc++.h>
using namespace std;
int main () {
	int n;
	string s;
	cin>>s;
	int f=0;
	for (int i=0;i<s.size();i++) {
		if (i%2==0&&s[i]>='a'&&s[i]<='z') continue;
		if (i%2==1&&s[i]>='A'&&s[i]<='Z') continue;
		f=1;
	}
	if (f)
		printf("No\n");
	else
		printf("Yes\n");
} 
#include <bits/stdc++.h>
using namespace std;
int main(){
  int L;
  cin>>L;
  long long ans =1;
  for(int i=1;i<=11;i++){
    ans*=L-i;
    ans/=i;
  }
  cout<<ans<<endl;
}

