#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; }