#include<cstdio>
#include<iostream>
#include<vector>
#include<map>
#include<cstring>
#include<array>
#include<queue>
#include<algorithm>
#include<set>
#include<cmath>
using namespace std;
using i64=long long;
//using i128=__int128;
//const i64 INF=1e18;
const int mod=998244353;
//const int N=1e9+7;
void solve(){
//模拟即可
string s;
cin>>s;
if(s.size()>8||s.size()<8){
cout<<"No"<<'\n';
return ;
}
if(!isupper(s[0])||!isupper(s[s.size()-1])){
cout<<"No"<<'\n';
return ;
}
string x;
for(int i=1;i<s.size()-1;i++){
x+=s[i];
}
int num=stoi(x);
if(num<100000||num>999999){
cout<<"No"<<'\n';
return ;
}
cout<<"Yes"<<'\n';
}
int main(){
int _=1;
//cin>>_;
while(_--)solve();
return 0;
}