#include<iostream>
using namespace std;
int main()
{
    string s;
    cin>>s;
    if (1,2,3,4,5,6,7,8,9,0)
    {
        cout<<"No";
    }
    else if(length(s)<=26){
        cout<<"No";
    }
    else
    {
        cout<<"Yes";
    }
}