#include<bits/stdc++.h> using namespace std; int main(){ char n; cin>>n; if(n>='a' && n<='z') cout<<"YES"; else if(n>='A' && n<='Z') cout<<"YES"; else cout<<"NO"; return 0; }
#include<bits/stdc++.h> using namespace std; int main(){ char n; cin>>n; if(n>='a' && n<='z') cout<<"YES"; else if(n>='A' && n<='Z') cout<<"YES"; else cout<<"NO"; return 0; }