#include<iostream>
using namespace std;
int main(){   
	int s;	
	cin>>s;
	if(s<=10000){
		cout<<"万"<<endl;
	} else if(s>=100000){ 
	    cout<<"十万"<<endl; 
	} else if(s>=100000){ 
	    cout<<"百万"<<endl; 
    }else if(s>=100000000){ 
	    cout<<"亿"<<endl; 
    }else if(s>=1000000000){ 
	    cout<<十亿<<endl; 

}